Ottawa police are investigating after shots were fired on York Street early Tuesday morning.

Police said they found four shell casings in the 300 block of York Street. They believe the shots were fired at about 2:30 a.m. Tuesday.

Investigators have no suspect information, police said.

Police are asking anyone with information to contact the guns and gangs unit at 613-236-1222, ext. 5050, or Crime Stoppers 613-233-8477 or toll free 1-800-8477.