COPA is investigating a shooting between an off-duty officer and two attackers in Washington Park

An off-duty Chicago police officer exchanged gunfire with two attackers in Washington Park on the South Side on Sunday morning.

At about 1:50 a.m. at 100 East 57th Street, an officer confronted two armed men and all three fired, although the officer was not injured and the attackers fled, Chicago police said.

Police did not say who fired first. The officer initially exchanged fire with one person, after which the second gunman also opened fire on the officer. Both attackers then fled.

No injuries were reported, police said.

The Civilian Office of Police Accountability is investigating, as it does with any officer who discharges a firearm.