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In pictures: Washington Navy Yard

  • A family member of a Navy Yard worker who was evacuated during a shooting arrives hoping to find him at a makeshift shelter at the Nationals Park baseball stadium near the naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    A family member of a Navy Yard worker who was evacuated during a shooting arrives hoping to find him at a makeshift shelter at the Nationals Park baseball stadium near the naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS/Jonathan Ernst
  • An official from the Washington, DC Office of the Medical Examiner wheels a body on a gurney out of the emergency room at George Washington University Hospital shortly after it was announced that the first victim of the shooting at the Navy Yard in Washington had died at the hospital, in Washington September 16, 2013. (REUTERS/Gary Cameron)
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    Washington Navy Yard shooting

    An official from the Washington, DC Office of the Medical Examiner wheels a body on a gurney out of the emergency room at George Washington University Hospital shortly after it was announced that the first victim of the shooting at the Navy Yard in Washington had died at the hospital, in Washington September 16, 2013. (REUTERS/Gary Cameron)
    REUTERS/Gary Cameron
  • (Heavily armed U.S. marshals walk from the Washington Navy Yard after a shooting by multiple gunmen in Washington, September 16, 2013. (REUTERS/Joshua Roberts)
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    Washington Navy Yard shooting

    (Heavily armed U.S. marshals walk from the Washington Navy Yard after a shooting by multiple gunmen in Washington, September 16, 2013. (REUTERS/Joshua Roberts)
    REUTERS/Joshua Roberts
  • A woman weeps as she is reunited with her husband, who was one of hundreds of Navy Yard workers evacuated to a makeshift Red Cross shelter after a shooting, at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    A woman weeps as she is reunited with her husband, who was one of hundreds of Navy Yard workers evacuated to a makeshift Red Cross shelter after a shooting, at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS
  • Members of the United States Marine Corps maintain a watch on their barracks as police respond to a shooting at the Washington Navy Yard, in Washington September 16, 2013. (REUTERS/Joshua Roberts)
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    Washington Navy Yard shooting

    Members of the United States Marine Corps maintain a watch on their barracks as police respond to a shooting at the Washington Navy Yard, in Washington September 16, 2013. (REUTERS/Joshua Roberts)
    REUTERS/Joshua Roberts
  • FBI.gov is "Seeking Information" about Aaron Alexis, now deceased, who is believed to be responsible for the shootings at the Washington Navy Yard in Washington, DC on September 16, 2013.
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    Navy Yard Shooting

    FBI.gov is "Seeking Information" about Aaron Alexis, now deceased, who is believed to be responsible for the shootings at the Washington Navy Yard in Washington, DC on September 16, 2013.
    FBI.gov
  • This is the 2011 handout photo of Aaron Alexis supplied by the FBI. FBI.gov is "Seeking Information" about Aaron Alexis, now deceased, who is believed to be responsible for the shootings at the Washington Navy Yard in Washington, DC on September 16, 2013.
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    Navy Yard Shooting

    This is the 2011 handout photo of Aaron Alexis supplied by the FBI. FBI.gov is "Seeking Information" about Aaron Alexis, now deceased, who is believed to be responsible for the shootings at the Washington Navy Yard in Washington, DC on September 16, 2013.
    FBI.gov
  • Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS
  • Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS
  • Police cars are parked outside the U.S. Navy Yard after a shooting in Washington September 16, 2013. (REUTERS/Joshua Roberts)
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    Washington Navy Yard shooting

    Police cars are parked outside the U.S. Navy Yard after a shooting in Washington September 16, 2013. (REUTERS/Joshua Roberts)
    REUTERS
  • Military and civilian employees leave after a shooting at the Washington Navy Yard in Washington September 16, 2013. (REUTERS/Joshua Roberts)
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    Washington Navy Yard shooting

    Military and civilian employees leave after a shooting at the Washington Navy Yard in Washington September 16, 2013. (REUTERS/Joshua Roberts)
    REUTERS
  • Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS
  • Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS
  • Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS
  • Navy Yard employee Omar Grant (right) leads blind colleague to safety after deadly shooting at the Washington Navy Yard in Washington, DC, September 16, 2013. (Chris Moody/Yahoo News)
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    Washington Navy Yard shooting

    Navy Yard employee Omar Grant (right) leads blind colleague to safety after deadly shooting at the Washington Navy Yard in Washington, DC, September 16, 2013. (Chris Moody/Yahoo News)
    Chris Moody/Yahoo News
  • Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS
  • A military gaurd stands post on the scene of a shooting at the Navy Yard in Washington, DC, USA, 16 September 2013. (EPA/SHAWN THEW)
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    Washington Navy Yard shooting

    A military gaurd stands post on the scene of a shooting at the Navy Yard in Washington, DC, USA, 16 September 2013. (EPA/SHAWN THEW)
    EPA/SHAWN THEW
  • Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS
  • Washington DC Mayor Vincent Gray speaks during a news conference as police respond to a shooting at the Washington Navy Yard in Washington, September 16, 2013. Up to three gunmen, at least two dressed in military-style clothing, killed several people and wounded at least four others in a shooting spree at the U.S. Navy Yard on Monday, officials said. (REUTERS/Joshua Roberts)
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    Washington Navy Yard shooting

    Washington DC Mayor Vincent Gray speaks during a news conference as police respond to a shooting at the Washington Navy Yard in Washington, September 16, 2013. Up to three gunmen, at least two dressed in military-style clothing, killed several people and wounded at least four others in a shooting spree at the U.S. Navy Yard on Monday, officials said. (REUTERS/Joshua Roberts)
    REUTERS
  • Navy Yard workers evacuated during a shooting arrive at a makeshift shelter at the Nationals Park baseball stadium near the naval installation, to be reuntied with family members, in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    Navy Yard workers evacuated during a shooting arrive at a makeshift shelter at the Nationals Park baseball stadium near the naval installation, to be reuntied with family members, in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS
  • Washington DC Police Chief Cathy Lanier speaks to the media near the scene of a shooting spree at the Washington Navy Yard in Washington, DC, USA, 16 September 2013. EPA/JIM LO SCALZO)
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    Washington Navy Yard shooting

    Washington DC Police Chief Cathy Lanier speaks to the media near the scene of a shooting spree at the Washington Navy Yard in Washington, DC, USA, 16 September 2013. EPA/JIM LO SCALZO)
    EPA/JIM LO SCALZO
  • Office workers are evacuated from the scene of a shooting at the Navy Yard in Washington, DC, USA, 16 September 2013. At least six people have been killed in a shooting at the US Navy Yard in Washington, base spokesman Ed Buclatin says. Several people have been injured after a shooter opened fire at the Navy Yard this morning. One suspect in the deadly shooting at the Washington Navy Yard was found dead after a firefight with police, while two other men were being sought as 'possible' suspects, Washington Police Chief Cathy Lanier said. EPA/SHAWN THEW
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    Navy Yard Shootings

    Office workers are evacuated from the scene of a shooting at the Navy Yard in Washington, DC, USA, 16 September 2013. At least six people have been killed in a shooting at the US Navy Yard in Washington, base spokesman Ed Buclatin says. Several people have been injured after a shooter opened fire at the Navy Yard this morning. One suspect in the deadly shooting at the Washington Navy Yard was found dead after a firefight with police, while two other men were being sought as 'possible' suspects, Washington Police Chief Cathy Lanier said. EPA/SHAWN THEW
    EPA/SHAWN THEW
  • Navy Yard workers evacuated during a shooting at the Washington Navy Yard wait at a makeshift shelter at the Nationals Park baseball stadium to be reunited with family members, in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    Navy Yard workers evacuated during a shooting at the Washington Navy Yard wait at a makeshift shelter at the Nationals Park baseball stadium to be reunited with family members, in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS
  • Law enforcement officers form a staging area on the streets outside the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (Chris Moody/Yahoo News)
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    Washington Navy Yard Shooting

    Law enforcement officers form a staging area on the streets outside the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (Chris Moody/Yahoo News)
    Chris Moody/Yahoo News
  • Patricia Ward, an employee at the Washington Navy Yard, speaks to the media about what she witnessed as police respond to a shooting at the Washington Navy Yard in Washington, September 16, 2013. (REUTERS/Joshua Roberts)
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    Washington Navy Yard shooting

    Patricia Ward, an employee at the Washington Navy Yard, speaks to the media about what she witnessed as police respond to a shooting at the Washington Navy Yard in Washington, September 16, 2013. (REUTERS/Joshua Roberts)
    REUTERS
  • Law enforcement officers form a staging area on the streets outside the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (Chris Moody/Yahoo News)
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    Washington Navy Yard Shooting

    Law enforcement officers form a staging area on the streets outside the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (Chris Moody/Yahoo News)
    Chris Moody/Yahoo News
  • Evacuees raise their hands as they are escorted from the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (REUTERS/Jason Reed)
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    Washington Navy Yard shooting

    Evacuees raise their hands as they are escorted from the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (REUTERS/Jason Reed)
    REUTERS
  • Members of the media work near the scene of a shooting spree at the Washington Navy Yard in Washington, DC, USA, 16 September 2013. (EPA/JIM LO SCALZO)
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    Washington Navy Yard shooting

    Members of the media work near the scene of a shooting spree at the Washington Navy Yard in Washington, DC, USA, 16 September 2013. (EPA/JIM LO SCALZO)
    EPA/JIM LO SCALZO
  • Law enforcement officers form a staging area on the streets outside the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    Law enforcement officers form a staging area on the streets outside the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS
  • A law enforcement officer with a rifle sits in a helicopter above the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
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    Washington Navy Yard shooting

    A law enforcement officer with a rifle sits in a helicopter above the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
    REUTERS
  • U.S. President Barack Obama speaks from the White House about the shootings at the U.S. Navy Yard in Washington September 16, 2013. Obama said the United States is facing "yet another mass shooting" with an armed attack at Washington's Navy Yard on Monday and vowed to hold accountable whoever was responsible. (REUTERS/Kevin Lamarque)
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    Shots fired at Washington Navy Yard

    U.S. President Barack Obama speaks from the White House about the shootings at the U.S. Navy Yard in Washington September 16, 2013. Obama said the United States is facing "yet another mass shooting" with an armed attack at Washington's Navy Yard on Monday and vowed to hold accountable whoever was responsible. (REUTERS/Kevin Lamarque)
    REUTERS
  • A Washington Police Emergency Response Team armored car (R) and other emergency vehicles fill M Street, Southeast, as they respond to a shooting at the Washington Navy Yard in Washington, September 16, 2013. Several people were killed and others were injured in the shooting at the Navy Yard in Washington D.C. on Monday. (REUTERS/Joshua Roberts)
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    Shots fired at Washington Navy Yard

    A Washington Police Emergency Response Team armored car (R) and other emergency vehicles fill M Street, Southeast, as they respond to a shooting at the Washington Navy Yard in Washington, September 16, 2013. Several people were killed and others were injured in the shooting at the Navy Yard in Washington D.C. on Monday. (REUTERS/Joshua Roberts)
    REUTERS
  • Law enforcement officers respond to the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. Several people were killed and others injured when at least one gunman opened fire at the U.S. Navy Yard in Washington D.C. on Monday, authorities said. One Navy official said that four people had died and eight others were injured, but other officials suggested caution over those numbers saying the situation was in flux. (REUTERS/Jason Reed)
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    Shots fired at Washington Navy Yard

    Law enforcement officers respond to the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. Several people were killed and others injured when at least one gunman opened fire at the U.S. Navy Yard in Washington D.C. on Monday, authorities said. One Navy official said that four people had died and eight others were injured, but other officials suggested caution over those numbers saying the situation was in flux. (REUTERS/Jason Reed)
    REUTERS
  • A Washington Metropolitan Police officer moves bystanders back from the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. The Navy did not immediately provide additional details but a Washington police spokesman said earlier that five people had been shot, including a District of Columbia police officer and one other law enforcement officer. (REUTERS/Jason Reed)
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    Shots fired at Washington Navy Yard

    A Washington Metropolitan Police officer moves bystanders back from the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. The Navy did not immediately provide additional details but a Washington police spokesman said earlier that five people had been shot, including a District of Columbia police officer and one other law enforcement officer. (REUTERS/Jason Reed)
    REUTERS
  • People stand outside a Starbucks Coffee shop that has been closed as police respond to a shooting at the Washington Navy Yard in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. The Navy did not immediately provide additional details but a Washington police spokesman said earlier that five people had been shot, including a District of Columbia police officer and one other law enforcement officer. (REUTERS/Joshua Roberts)
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    Shots fired at Washington Navy Yard

    People stand outside a Starbucks Coffee shop that has been closed as police respond to a shooting at the Washington Navy Yard in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. The Navy did not immediately provide additional details but a Washington police spokesman said earlier that five people had been shot, including a District of Columbia police officer and one other law enforcement officer. (REUTERS/Joshua Roberts)
    REUTERS
  • A police helicopter lifts what appears to be a shooting victim up as it hovers over a rooftop on the Washington Navy Yard campus in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. The Navy did not immediately provide additional details but a Washington police spokesman said earlier that five people had been shot, including a District of Columbia police officer and one other law enforcement officer. (REUTERS/Jonathan Ernst)
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    Shots fired at Washington Navy Yard

    A police helicopter lifts what appears to be a shooting victim up as it hovers over a rooftop on the Washington Navy Yard campus in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. The Navy did not immediately provide additional details but a Washington police spokesman said earlier that five people had been shot, including a District of Columbia police officer and one other law enforcement officer. (REUTERS/Jonathan Ernst)
    REUTERS
  • A helicopter pulls what appears to be a shooting victim up as it hovers over a rooftop on the Washington Navy Yard campus in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. The Navy did not immediately provide additional details but a Washington police spokesman said earlier that five people had been shot, including a District of Columbia police officer and one other law enforcement officer. (REUTERS/Jason Reed)
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    Shots fired at Washington Navy Yard

    A helicopter pulls what appears to be a shooting victim up as it hovers over a rooftop on the Washington Navy Yard campus in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. The Navy did not immediately provide additional details but a Washington police spokesman said earlier that five people had been shot, including a District of Columbia police officer and one other law enforcement officer. (REUTERS/Jason Reed)
    REUTERS
  • Washington Navy Yard personnel are evacuated after a gunman reportedly shot several people inside the base in Washington, September 16, 2013. (REUTERS/Jason Reed)
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    Shots fired at Washington Navy Yard

    Washington Navy Yard personnel are evacuated after a gunman reportedly shot several people inside the base in Washington, September 16, 2013. (REUTERS/Jason Reed)
    REUTERS
  • Law enforcement officers are deployed on a rooftop as they respond to a shooting on the base at the Navy Yard in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. (REUTERS/Jason Reed)
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    Shots fired at Washington Navy Yard

    Law enforcement officers are deployed on a rooftop as they respond to a shooting on the base at the Navy Yard in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. (REUTERS/Jason Reed)
    REUTERS
  • Members of various law enforcement agencies are pictured at the Washington Navy Yard campus in Washington, September 16, 2013. A gunman shot several people at the U.S. Navy Yard on Monday, with possible fatalities reported and the shooter being sought at the Naval Sea Systems Command headquarters, the Navy said. (REUTERS/Jason Reed)
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    Shots fired at Washington Navy Yard

    Members of various law enforcement agencies are pictured at the Washington Navy Yard campus in Washington, September 16, 2013. A gunman shot several people at the U.S. Navy Yard on Monday, with possible fatalities reported and the shooter being sought at the Naval Sea Systems Command headquarters, the Navy said. (REUTERS/Jason Reed)
    REUTERS
  • Police block off M Street, SE as they respond to a shooting at the Washington Navy Yard, in Washington September 16, 2013. A gunman shot five people at the U.S. Navy Yard on Monday, including two law enforcement officers, and the shooter was being sought in a building housing the Naval Sea Systems Command headquarters, officials said. (REUTERS/Joshua Roberts)
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    Shots fired at Washington Navy Yard

    Police block off M Street, SE as they respond to a shooting at the Washington Navy Yard, in Washington September 16, 2013. A gunman shot five people at the U.S. Navy Yard on Monday, including two law enforcement officers, and the shooter was being sought in a building housing the Naval Sea Systems Command headquarters, officials said. (REUTERS/Joshua Roberts)
    REUTERS
  • A police helicopter is seen as police walk on the roof of a building as they respond to a shooting at the Washington Navy Yard, in Washington September 16, 2013. A gunman shot five people at the U.S. Navy Yard on Monday, including two law enforcement officers, and the shooter was being sought in a building housing the Naval Sea Systems Command headquarters, officials said. (REUTERS/Joshua Roberts)
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    Shots fired at Washington Navy Yard

    A police helicopter is seen as police walk on the roof of a building as they respond to a shooting at the Washington Navy Yard, in Washington September 16, 2013. A gunman shot five people at the U.S. Navy Yard on Monday, including two law enforcement officers, and the shooter was being sought in a building housing the Naval Sea Systems Command headquarters, officials said. (REUTERS/Joshua Roberts)
    REUTERS
  • A police helicopter flies over the Washington Navy Yard as police respond to a shooting, in Washington September 16, 2013. A gunman shot five people at the U.S. Navy Yard on Monday, including two law enforcement officers, and the shooter was being sought in a building housing the Naval Sea Systems Command headquarters, officials said. (REUTERS/Joshua Roberts)
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    Shots fired at Washington Navy Yard

    A police helicopter flies over the Washington Navy Yard as police respond to a shooting, in Washington September 16, 2013. A gunman shot five people at the U.S. Navy Yard on Monday, including two law enforcement officers, and the shooter was being sought in a building housing the Naval Sea Systems Command headquarters, officials said. (REUTERS/Joshua Roberts)
    REUTERS
  • A police vehicle is seen as police respond to a shooting at the Washington Navy Yard, in Washington, September 16, 2013. (REUTERS/Joshua Roberts)
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    Shots fired at Washington Navy Yard

    A police vehicle is seen as police respond to a shooting at the Washington Navy Yard, in Washington, September 16, 2013. (REUTERS/Joshua Roberts)
    REUTERS
  • A police helicopter flies overhead as police walk on the roof of a building as they respond to a shooting at the Washington Navy Yard in Washington September 16, 2013. A gunman shot five people at the U.S. Navy Yard on Monday, including two law enforcement officers, and the shooter was being sought in a building housing the Naval Sea Systems Command headquarters, officials said. (REUTERS/Joshua Roberts)
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    Shots fired at Washington Navy Yard

    A police helicopter flies overhead as police walk on the roof of a building as they respond to a shooting at the Washington Navy Yard in Washington September 16, 2013. A gunman shot five people at the U.S. Navy Yard on Monday, including two law enforcement officers, and the shooter was being sought in a building housing the Naval Sea Systems Command headquarters, officials said. (REUTERS/Joshua Roberts)
    REUTERS
  • A photo posted to the feed of Twitter user ‏@timjhogan near the shooting scene of the Naval Sea Systems Command headquarters on Monday, Sept. 16, 2013. (Tim Hogan: ‏@timjhogan via Twitter)
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    Shots fired at Washington Navy Yard

    A photo posted to the feed of Twitter user ‏@timjhogan near the shooting scene of the Naval Sea Systems Command headquarters on Monday, Sept. 16, 2013. (Tim Hogan: ‏@timjhogan via Twitter)
    Tim Hogan: ‏@timjhogan via Twitter
  • A photo posted to the feed of Twitter user ‏@timjhogan near the shooting scene of the Naval Sea Systems Command headquarters on Monday, Sept. 16, 2013. (Tim Hogan: ‏@timjhogan via Twitter)
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    Shots fired at Washington Navy Yard

    A photo posted to the feed of Twitter user ‏@timjhogan near the shooting scene of the Naval Sea Systems Command headquarters on Monday, Sept. 16, 2013. (Tim Hogan: ‏@timjhogan via Twitter)
    Tim Hogan: ‏@timjhogan via Twitter
  • At least 13 people died Monday during a shooting at the Washington Navy Yard, officials said. One gunman died in the shooting, and police are seeking two other possible shooters.<br><br>The Navy Yard was placed on lockdown after shots were fired inside a building on the base, the U.S. Navy said.
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    Map Navy Yard

    At least 13 people died Monday during a shooting at the Washington Navy Yard, officials said. One gunman died in the shooting, and police are seeking two other possible shooters.

    The Navy Yard was placed on lockdown after shots were fired inside a building on the base, the U.S. Navy said.
    AP/Yahoo News Graphics
A family member of a Navy Yard worker who was evacuated during a shooting arrives hoping to find him at a makeshift shelter at the Nationals Park baseball stadium near the naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
An official from the Washington, DC Office of the Medical Examiner wheels a body on a gurney out of the emergency room at George Washington University Hospital shortly after it was announced that the first victim of the shooting at the Navy Yard in Washington had died at the hospital, in Washington September 16, 2013. (REUTERS/Gary Cameron)
(Heavily armed U.S. marshals walk from the Washington Navy Yard after a shooting by multiple gunmen in Washington, September 16, 2013. (REUTERS/Joshua Roberts)
A woman weeps as she is reunited with her husband, who was one of hundreds of Navy Yard workers evacuated to a makeshift Red Cross shelter after a shooting, at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
Members of the United States Marine Corps maintain a watch on their barracks as police respond to a shooting at the Washington Navy Yard, in Washington September 16, 2013. (REUTERS/Joshua Roberts)
FBI.gov is "Seeking Information" about Aaron Alexis, now deceased, who is believed to be responsible for the shootings at the Washington Navy Yard in Washington, DC on September 16, 2013.
This is the 2011 handout photo of Aaron Alexis supplied by the FBI. FBI.gov is "Seeking Information" about Aaron Alexis, now deceased, who is believed to be responsible for the shootings at the Washington Navy Yard in Washington, DC on September 16, 2013.
Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
Police cars are parked outside the U.S. Navy Yard after a shooting in Washington September 16, 2013. (REUTERS/Joshua Roberts)
Military and civilian employees leave after a shooting at the Washington Navy Yard in Washington September 16, 2013. (REUTERS/Joshua Roberts)
Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
Navy Yard employee Omar Grant (right) leads blind colleague to safety after deadly shooting at the Washington Navy Yard in Washington, DC, September 16, 2013. (Chris Moody/Yahoo News)
Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
A military gaurd stands post on the scene of a shooting at the Navy Yard in Washington, DC, USA, 16 September 2013. (EPA/SHAWN THEW)
Navy Yard workers evacuated after the shooting are reunited with loved ones at a makeshift Red Cross shelter at the Nationals Park baseball stadium near the affected naval installation in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
Washington DC Mayor Vincent Gray speaks during a news conference as police respond to a shooting at the Washington Navy Yard in Washington, September 16, 2013. Up to three gunmen, at least two dressed in military-style clothing, killed several people and wounded at least four others in a shooting spree at the U.S. Navy Yard on Monday, officials said. (REUTERS/Joshua Roberts)
Navy Yard workers evacuated during a shooting arrive at a makeshift shelter at the Nationals Park baseball stadium near the naval installation, to be reuntied with family members, in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
Washington DC Police Chief Cathy Lanier speaks to the media near the scene of a shooting spree at the Washington Navy Yard in Washington, DC, USA, 16 September 2013. EPA/JIM LO SCALZO)
Office workers are evacuated from the scene of a shooting at the Navy Yard in Washington, DC, USA, 16 September 2013. At least six people have been killed in a shooting at the US Navy Yard in Washington, base spokesman Ed Buclatin says. Several people have been injured after a shooter opened fire at the Navy Yard this morning. One suspect in the deadly shooting at the Washington Navy Yard was found dead after a firefight with police, while two other men were being sought as 'possible' suspects, Washington Police Chief Cathy Lanier said. EPA/SHAWN THEW
Navy Yard workers evacuated during a shooting at the Washington Navy Yard wait at a makeshift shelter at the Nationals Park baseball stadium to be reunited with family members, in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
Law enforcement officers form a staging area on the streets outside the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (Chris Moody/Yahoo News)
Patricia Ward, an employee at the Washington Navy Yard, speaks to the media about what she witnessed as police respond to a shooting at the Washington Navy Yard in Washington, September 16, 2013. (REUTERS/Joshua Roberts)
Law enforcement officers form a staging area on the streets outside the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (Chris Moody/Yahoo News)
Evacuees raise their hands as they are escorted from the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (REUTERS/Jason Reed)
Members of the media work near the scene of a shooting spree at the Washington Navy Yard in Washington, DC, USA, 16 September 2013. (EPA/JIM LO SCALZO)
Law enforcement officers form a staging area on the streets outside the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
A law enforcement officer with a rifle sits in a helicopter above the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. (REUTERS/Jonathan Ernst)
U.S. President Barack Obama speaks from the White House about the shootings at the U.S. Navy Yard in Washington September 16, 2013. Obama said the United States is facing "yet another mass shooting" with an armed attack at Washington's Navy Yard on Monday and vowed to hold accountable whoever was responsible. (REUTERS/Kevin Lamarque)
A Washington Police Emergency Response Team armored car (R) and other emergency vehicles fill M Street, Southeast, as they respond to a shooting at the Washington Navy Yard in Washington, September 16, 2013. Several people were killed and others were injured in the shooting at the Navy Yard in Washington D.C. on Monday. (REUTERS/Joshua Roberts)
Law enforcement officers respond to the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. Several people were killed and others injured when at least one gunman opened fire at the U.S. Navy Yard in Washington D.C. on Monday, authorities said. One Navy official said that four people had died and eight others were injured, but other officials suggested caution over those numbers saying the situation was in flux. (REUTERS/Jason Reed)
A Washington Metropolitan Police officer moves bystanders back from the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. The Navy did not immediately provide additional details but a Washington police spokesman said earlier that five people had been shot, including a District of Columbia police officer and one other law enforcement officer. (REUTERS/Jason Reed)
People stand outside a Starbucks Coffee shop that has been closed as police respond to a shooting at the Washington Navy Yard in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. The Navy did not immediately provide additional details but a Washington police spokesman said earlier that five people had been shot, including a District of Columbia police officer and one other law enforcement officer. (REUTERS/Joshua Roberts)
A police helicopter lifts what appears to be a shooting victim up as it hovers over a rooftop on the Washington Navy Yard campus in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. The Navy did not immediately provide additional details but a Washington police spokesman said earlier that five people had been shot, including a District of Columbia police officer and one other law enforcement officer. (REUTERS/Jonathan Ernst)
A helicopter pulls what appears to be a shooting victim up as it hovers over a rooftop on the Washington Navy Yard campus in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. The Navy did not immediately provide additional details but a Washington police spokesman said earlier that five people had been shot, including a District of Columbia police officer and one other law enforcement officer. (REUTERS/Jason Reed)
Washington Navy Yard personnel are evacuated after a gunman reportedly shot several people inside the base in Washington, September 16, 2013. (REUTERS/Jason Reed)
Law enforcement officers are deployed on a rooftop as they respond to a shooting on the base at the Navy Yard in Washington, September 16, 2013. The U.S. Navy said several people were injured and there were possible fatalities in the shooting at the Navy Yard in Washington D.C. on Monday. (REUTERS/Jason Reed)
Members of various law enforcement agencies are pictured at the Washington Navy Yard campus in Washington, September 16, 2013. A gunman shot several people at the U.S. Navy Yard on Monday, with possible fatalities reported and the shooter being sought at the Naval Sea Systems Command headquarters, the Navy said. (REUTERS/Jason Reed)
Police block off M Street, SE as they respond to a shooting at the Washington Navy Yard, in Washington September 16, 2013. A gunman shot five people at the U.S. Navy Yard on Monday, including two law enforcement officers, and the shooter was being sought in a building housing the Naval Sea Systems Command headquarters, officials said. (REUTERS/Joshua Roberts)
A police helicopter is seen as police walk on the roof of a building as they respond to a shooting at the Washington Navy Yard, in Washington September 16, 2013. A gunman shot five people at the U.S. Navy Yard on Monday, including two law enforcement officers, and the shooter was being sought in a building housing the Naval Sea Systems Command headquarters, officials said. (REUTERS/Joshua Roberts)
A police helicopter flies over the Washington Navy Yard as police respond to a shooting, in Washington September 16, 2013. A gunman shot five people at the U.S. Navy Yard on Monday, including two law enforcement officers, and the shooter was being sought in a building housing the Naval Sea Systems Command headquarters, officials said. (REUTERS/Joshua Roberts)
A police vehicle is seen as police respond to a shooting at the Washington Navy Yard, in Washington, September 16, 2013. (REUTERS/Joshua Roberts)
A police helicopter flies overhead as police walk on the roof of a building as they respond to a shooting at the Washington Navy Yard in Washington September 16, 2013. A gunman shot five people at the U.S. Navy Yard on Monday, including two law enforcement officers, and the shooter was being sought in a building housing the Naval Sea Systems Command headquarters, officials said. (REUTERS/Joshua Roberts)
A photo posted to the feed of Twitter user ‏@timjhogan near the shooting scene of the Naval Sea Systems Command headquarters on Monday, Sept. 16, 2013. (Tim Hogan: ‏@timjhogan via Twitter)
A photo posted to the feed of Twitter user ‏@timjhogan near the shooting scene of the Naval Sea Systems Command headquarters on Monday, Sept. 16, 2013. (Tim Hogan: ‏@timjhogan via Twitter)
At least 13 people died Monday during a shooting at the Washington Navy Yard, officials said. One gunman died in the shooting, and police are seeking two other possible shooters.<br><br>The Navy Yard was placed on lockdown after shots were fired inside a building on the base, the U.S. Navy said.
Updated

The FBI is asking the public for help in determining why a former Navy reservist opened fire early Monday, Sept. 16, 2013 at the Washington Navy Yard, killing at least 12 people before he was shot dead by police. Police said they also are seeking another possible shooter.

The suspected gunman was identified by the FBI as Aaron Alexis, a 34-year-old civilian contractor from Queens, N.Y., who most recently resided in Fort Worth, Texas. The FBI asked the public to contact the bureau with any tips related to the shooter. "This investigation is still very active," Valerie Parlave, the FBI's assistant director-in-charge, said at a news conference. "No piece of information is too small." (Associated Press)