CHICAGO (CBS) — An off-duty Chicago police officer fired shots while trying to stop a robbery attempt in the Morgan Park neighborhood, police said. Sources said the target of the robbery was the officer’s wife.

Police said a woman was getting into her car near 107th Place and Morgan Street shortly after 8 a.m., when a white SUV pulled up, and someone inside said “give us whatever you have.”

The woman ran back into her house for help.

Police Department spokesman Anthony Guglielmi said an off-duty officer intervened, and the robber fired a shot at the officer, who returned fire. No one was injured.

Sources said the woman targeted in the robbery is the officer’s wife.

It was not immediately clear how many people were in the SUV involved in the robbery. The SUV fled the scene after the shooting.

Area South detectives and the Civilian Office of Police Accountability were investigating.