The shooting happened in the Englewood neighborhood's 800 block of West 63rd Street at about 7:15 p.m., police said. A 15-year-old girl was sitting in a parked vehicle when she was shot in the buttocks.
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A family member took the victim to St. Bernard Hospital in fair condition, police said. She will be transferred to Comer Children's Hospital.
There is no one in custody and Area One detectives are investigating.
Police did not immediately provide further information about the shooting.