HARVEY, Ill. -- Emergency crews responded to a 4-alarm fire in suburban Harvey, Ill. Friday afternoon.
The first fire was located at 14631 Halsted.
Authorities said witness say they saw a man start the fire then took off running. While firefighters were responding, calls were coming in for another fire.
One firefighter suffered a sprained ankle during the incident.
Arson investigators are now in Harvey and police are reviewing surveillance video and questioning several people.
The investigation is ongoing.