CHICAGO (CBS) — A crash in which shots might have been fired shut down inbound lanes on the Bishop Ford Freeway near 103rd Street Thursday afternoon.

Illinois State Police said a male victim of a two-vehicle crash called troopers to report that his vehicle as involved in a crash with a car that left the scene.

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The victim was not injured.

A state police dispatcher initially reported that there were shell casings left on the roadway, and that there were victims who were not being cooperative with police.

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But state police later said the question of whether shots were fired remained under investigation.

Traffic was forced off the expressway at Stony Island Avenue.

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There have been six shootings on the Bishop Ford Freeway so far this year.