(CHICAGO) An off-duty Cook County sheriff’s correctional officer shot a man during an attempted robbery Sunday night in the East Garfield Park neighborhood on the West Side.

The officer was fired at by an armed man in the 3400 block of West Madison about 10:30 p.m, according to Chicago Police and the Cook County sheriff’s office. He returned fire, shooting the suspect in the leg.

Police said the exchange of gunfire happened during a robbery.

The suspect, a man whose age was not immediately available, was shot in the lower right leg and drove himself to Stroger Hospital, police said. He was in custody at the hospital early Monday.

The officer did not appear to be injured, but was taken to a hospital as a precaution, the sheriff’s office said.

Chicago Police are investigating.