A man opened fire in a classroom at a primary school in south California, reportedly killing a female teacher and wounding two children before turning the gun on himself.
The incident, an apparent murder-suicide, happened at about 11am on Monday in a classroom at North Park Elementary School in San Bernardino, east of Los Angeles.
The wounded students, who were taken to hospital for treatment, were not believed to have been targeted by the gunman, police said.
Their conditions were not immediately known.
Police Captain Ron Maas said investigators were working to confirm the identities of the gunman and the dead woman to determine their relationship, if any, and whether the shooting stemmed from a domestic dispute.
Authorities provided few details about the circumstances of the North Park Elementary shooting, except to say that the gunman had gained entry to the school as a visitor and kept his weapon concealed until inside the classroom.
Two adults are deceased in a classroom, believed to be a murder suicide. We believe the suspect is down and there's no further threat.— Chief Jarrod Burguan (@SBPDChief) April 10, 2017
Police operations are continuing to secure the area. However, we do believe the threat is down.— Chief Jarrod Burguan (@SBPDChief) April 10, 2017
The school was evacuated and students were driven to the campus of California State University at San Bernardino to be briefed and interviewed by authorities.
From there, they were to be taken to a nearby high school to be reunited with their families, police said.
Aerial television footage from the scene showed children holding hands and walking single-file across the campus from the school building to waiting buses.
One young student, reunited with her mother, told local media that the incident left her "super scared."
Anxious parents interviewed on camera said they had been given no information from the school other than where their children were being taken.