Chopper 7 was over the scene at 7 a.m. showing as police shut down the 5600-block of Touhy Avenue in Niles.
Niles police said the crash happened at about 6:08 a.m.
A man, 84, was crossing the road outside of a marked crosswalk, when he was struck by a vehicle.
The victim was taken to Lutheran General Hospital, where he later died.
Video shows police investigating a black SUV with damage to the driver's side.
All eastbound and westbound lanes of Touhy Avenue were closed on Tuesday amid the investigation.