CHICAGO — An off-duty Cook County Sheriff’s investigator was injured in a shooting Wednesday on Chicago’s Southwest Side.

The shooting happened around 9 p.m. Wednesday near West 47th Street and South Cicero Avenue, not far from Midway Airport.

According to police, the 37-year-old off-duty investigator witnessed two vehicles heading north on Cicero Avenue when shots fired between the two cars.

One of the vehicles hit another car headed in the opposite direction, then slammed into a wall near a McDonald’s restaurant.

The investigator sustained multiple gunshot wounds, Chicago police said. He was shot in the right elbow and lower back. Police say he was the unintended target.

“He was transported to the hospital in critical condition. On Thursday afternoon the Cook County’s Sheriff’s Office released a statement that said he has now stabilized.”

Police said the driver of the vehicle attempted to flee, but was caught. It is unclear who actually arrested that driver.

The suspect was transported to Mount Sinai Hospital in good condition.

Community activists gather at the scene Thursday and announced a $2,500 reward for information leading to an arrest and conviction for anyone else involved.