At about 1:08 p.m., police were called to I-355 near 127th Street in Lemont for reports of an alleged shooting.
Chopper 7 was over the scene, showing a black truck and a semi near the investigation.
There appeared to be bullet holes in the pickup truck.
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So far, no injuries were reported.
All traffic was being diverted off at 127th Street.
The roadway later reopened.
No other information was available.