The two victims, a 19-year-old male and a 17-year-old male, were shot by someone they got into an argument with in the 5300 block of W. Division in Austin around 8:32 a.m., Chicago police said.
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Police said the 19-year-old victim was shot several times and was transported to Stroger Hospital, where he died. His name has not yet been released.
The 17-year-old victim is in serious condition at Stroger after being shot in the groin, buttocks and thigh, police said.
Area Five detectives are speaking to a person of interest, police said.