Maryland shooting: Shooter named after woman kills three before turning gun on herself in US

The shooter in Maryland who turned a gun on herself after shooting four dead has been named.

Hartford County Sheriff Jeffey Gahler has named Snochia Moseley, a 26-year-old from Baltimore County, as the shooter involved in the attack.

The lone suspect open fired on a Maryland distribution center, for the Rite Aid drugstore chain, killing three people and wounding three others before taking her own life, the sheriff said.

People were shot inside and outside the building where the incident occurred, near to Spesutia and Perryman Road.

At an earlier press briefing, Sheriff Gahler, of Harford County, said there were "multiple wounded and multiple fatalities", describing the incident as "another tragic event".

He said: "Many people have been affected by the events here this morning.

"There are a lot of families irreparably harmed."

It has been confirmed by the sheriff that she was a temporary employee at the center and had reported to work at about 9am (US time).

The sheriff said investigators have not yet determined a motive, but a law enforcement source told said the shooting was believed to have been sparked by a work-related grievance.

Mr Gahler said Thursday's gun violence began outside the warehouse and then moved inside, but investigators were still piecing together the precise sequence of events.

He said a total of seven people were hit by gunfire and that four, including the woman who opened fire, were killed. The three others were expected to survive, according to the sheriff. He said the suspect shot herself in the head.

No shots were fired by any law enforcement officers, he said.

The Rite Aid center, located among other warehouses in an industrial park, has nearly 1,000 employees, company spokesman Pete Strella said. The facility packages pharmaceuticals and other products for delivery to more than 2,500 stores.

Police spent several hours searching the 210,000-square-foot (19,510-square-meter) building for any possible additional victims, the sheriff's office said.

"Our prayers are with all those impacted, including our first responders," Governor Larry Hogan wrote on Twitter. "The State stands ready to offer any support."

Agents from the Baltimore offices of the federal Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) and the FBI also responded, the agencies said.

The shooting occurred a day after a man shot and wounded four people, including a police officer, at a Pennsylvania court building before he was killed by police, according to Pennsylvania State Police.

Additional reporting by Reuters