Multiple people were killed Thursday morning in northeast Maryland, authorities said Thursday.
Police responded to a call shortly after 9 a.m. at a Rite Aid distribution center, Harford County Sheriff Jeff Gahler said at a news conference.
Gahler cautioned that the investigation was still preliminary but said "multiple" people had been killed and "multiple" people were injured.
The shooting occurred at Spesutia Road and Perryman Road in Aberdeen, reports ABC News.
The lone suspect is in custody and in critical condition at a local hospital, Gahler said. The suspect used a handgun, he added.
"We do not believe that there is an additional threat," he noted.