An accident shut down Interstate 57 in Matteson during the afternoon rush hour Monday, causing massive delays on the roadway.
The accident happened in the northbound lanes of the interstate near US-30, according to authorities. All northbound lanes were blocked.
Information on the number of cars involved and details on any injuries weren't immediately known.
Drivers were being urged to use US-50 and US-45 as alternates.
A second accident was also reported at Stuenkel Road, according to officials. Details on that crash were not being immediately released.
Check back for more on this developing story.