Around 3:22 a.m. Illinois State Police responded to a crash involving at least three cars.READ MORE: Crews Begin Cleanup Of Grant Park After Lollapalooza
One car was left with its rear end completely caved in. At least two other people were injured in the crash in addition to the person who died.READ MORE: Pickpockets Travel More Than 1,000 Miles To Steal Phones At Lollapalooza, But Some Victims Got Their Phones Back
The area near the scene was closed off and traffic was redirected for hours.MORE NEWS: Judge Gives Jussie Smollett's Defense Team More Time To Prepare Pre-Trial Arguments
Late Sunday, Illinois State Police were still investigating – trying to figure out exactly how the crash happened.