The victims were in the 800-block of N Hamlin around 6 p.m. when they were struck by gunfire, according to police.
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A 16-year-old male was struck in the thigh and self-transported to West Suburban Hospital in unknown condition.
A 21-year-old male was struck in the back and transported to Stroger Hospital in good condition.
A 17-year-old male was struck in the chest and was transported to Mt. Sinai Hospital, where he was pronounced dead, police said.
Police did not release any other details.
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No one is in custody and area detectives are investigating.
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