Police said officers responded to a call about an unresponsive person lying in the street in the Montclare neighborhood's 6700-block of West Grand Avenue around 12:50 a.m.
Responding officers found a 17-year-old boy, who had suffered multiple gunshot wounds to his body, police said.
The victim was transported to Loyola Hospital, where he was pronounced dead, police said. His identity was not immediately released.
What led up to the gunfire was not immediately clear.
Area Five detectives are investigating.
Authorities did not immediately provide further information about the shooting.
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