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Story summary
- Illinois State Police shut down outbound lanes on I-290 in Oak Park for a shooting investigation.
- NBC Chicago traffic reporter Kye Martin reported the incident began around 2:40 a.m. Friday.
- Troopers walked the lanes between Austin and Harlem Avenue.
- Six police vehicles, tow trucks, and nine flashlight-carrying officers were positioned across the expressway.
- Lanes reopened by 6 a.m., but traffic delays persisted.