The shooting happened at about 3:53 p.m. in the Calumet Heights neighborhood's 9100 block of South Paxton Avenue, Chicago police said.
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The 6-year-old girl was in the backyard of a residence when she sustained a graze wound to the thigh by an unknown offender, police said. The victim was transported to Comer Children's Hospital in good condition.
Area Two Detectives are investigating.
Police did not provide further information about the shooting.