First responders were called shortly after 10 a.m. to a crash involving a bus near Columbus Drive and Roosevelt Road, according to the Chicago Fire Department.
One person was taken in serious condition to Northwestern Memorial Hospital, CFD spokesman Larry Merritt said.
Two others went to Insight Hospital and Medical Center, and another person went to Stroger Hospital, he said. Their conditions were not released.
Chicago police did not immediately have information about the crash.
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