The Ottawa Police Service's guns and gangs unit is investigating after between 30 and 40 bullet casings were found at the scene of an early morning shootout in Nepean.

Police said they were called to the intersection of Woodroffe Avenue and Navaho Drive, near the Algonquin College campus, around 2:30 a.m. Saturday after getting "numerous" 911 calls from residents.

One man was injured in the shootout and was sent to hospital with a superficial gunshot wound, police said. He has since been released from hospital.

No arrests have been made and police have yet to identify a suspect.

The investigation continues.