BLOOMINGTON, Minn. (AP) — The Mall of America announced it was lifting a lockdown after Minnesota police responded to a reported shooting on Friday.

The Bloomington Police Department tweeted shortly after 8:15 p.m. that police and emergency medical crews were on the scene of a shooting at the mall. The lockdown lasted for about an hour before the mall tweeted that shoppers were being sent outside.

Police did not immediately provide details on whether anyone was injured or arrested.

The Mall of America confirmed the lockdown on its Twitter account and asked shoppers to remain in “the closest secure location.”

Mall officials said on Twitter that the lockdown was lifted later on Friday.

Since it opened in 1992, the mall has been the largest in the U.S. and is a tourist destination and community gathering spot. It bans guns on the premises but does not have metal detectors at its entrances.

The mall was placed on lockdown in August after a reported shooting at the suburban Minneapolis shopping complex sent some shoppers running for cover and two people were wounded last New Year’s Eve during an apparent altercation.

Representatives from the city of Bloomington and the Mall of America did not immediately return requests for comment.