A window of a vacant storefront was shot out early Sunday after an unknown suspect fired at a group of men in Downtown Long Beach, authorities said.

Police first discovered the damaged window, which belonged to an empty ground-floor commercial space with residential units above, when they were called to assist Long Beach fire personnel at Fourth Street and Pine Avenue at about 8:30 a.m., according to Long Beach police spokeswoman Karen Owens.

“Officers located a window that appeared to have been shot out at a vacant commercial building but had no information on when the possible shooting occurred,” Owens said.

Officers kept investigating and found surveillance footage that showed an unidentified male suspect shooting at a group of unidentified men at about 1:50 a.m. near Fifth Street and Pine Avenue, Owens said.

The victims fled on foot and the suspect fled in an unknown type of vehicle. No injuries were reported.

A motive for the shooting is unknown. The investigation is ongoing.

Editor’s note: An earlier version of this story and headline implied the entire building was vacant. The storefront on the ground floor was vacant. The residential units above it are not.