CHICAGO (AP) — Authorities say a suburban Chicago police officer has shot and wounded a motorist who hit two squad cars after police followed a vehicle into the city's Far South Side.

Chicago police say the shooting happened early Wednesday in Chicago's Mount Greenwood neighborhood and a 25-year-old man was taken to a hospital in serious condition with a shoulder wound.

Officers had followed the motorist from the suburb of Alsip.

A statement from Chicago police described what happened in their jurisdiction as an "aggravated assault." Two Alsip officers also were taken to a hospital as a precaution.

John Murphy told WLS-TV that he was nearby with a friend when the shooting happened. He says he saw police pull over the car then heard several shots.