A temporary employee at a Rite Aid distribution center in Maryland killed three co-workers and injured three others before killing herself Thursday morning, Harford County Sheriff Jeffrey Gahler said.
Gahler declined to release the names of any of the victims, saying families are still being notified of their deaths.
He identified the shooter as Snochia Moseley, 26. Police are serving warrants at her last known address, in Baltimore County, Gahler said.
The gun, a 9mm Glock, was registered and owned by the suspect, he said.