The shooting happened on the inbound Dan Ryan Expressway near 69th Street just before 5:30 a.m. A man was shot and transported University of Chicago Medical Center with gunshot wounds to his legs, Chicago Fire Department spokesman Larry Langford said. He was listed in serious-to-critical condition, he said.
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The I-94 northbound at 71th Street was closed for the investigation at about 6:13 a.m., state police said. Police were preventing traffic from traveling into the local lanes, causing delays on the expressway.
All lanes have since been reopened.
State police asked anyone who witnessed the shooting or has any knowledge of the shooting to contact the ISP by phone at 847-294-4400 or email at ISP.CrimeTips@Illinois.gov.
Police did not provide further information about the incident.
State police asked anyone who witnessed the shooting or has any knowledge of the incident to contact officials by phone at 847-294-4400. Witnesses can remain anonymous.
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The Sun-Times Media Wire contributed to this report.