The boy was shot in the chest while standing at the back entrance of a home in the 6600-block of South Marshfield Avenue just after 9 p.m., CPD said.
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He was taken to Comer Children's Hospital in serious condition.
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A witness told police three suspects were wearing masks at the time of the incident, and fled on foot.
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No one was in custody early Tuesday, and Area One detectives are investigating.
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