COLUMBIA, Md. (AP) — A shooting occurred at a mall in Maryland on Saturday morning, police said. It was not immediately known whether there were injuries or how many potential shooters may have been involved.

Howard County police said via Twitter that a shooting had taken place at the Mall in Columbia, a suburb of both Baltimore and Washington. The mall typically opens at 10 a.m. on Saturdays.

"There has been a shooting incident at the Columbia mall," the police department tweeted.

The Howard County Fire and emergency services department sent out at tweet at 11:25 a.m. Saturday, saying that police and rescuers were responding to "an active shooter" at the mall. The mall typically opens at 10 a.m. on Saturdays and it was not known how many shoppers or workers might have been at the scene.

The mall is at the center of the town.