Teen in critical condition after drive-by shooting on Chicago's South Side

CHICAGO - A teen is in critical condition after being shot on Chicago South Side Wednesday afternoon. 

At 3:39 p.m., a 15-year-old boy was walking on the sidewalk in the 100 block of West Root when an unknown offender pulled up inside a vehicle and fired shots.

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The victim was shot in the back and transported to Comer Childrens Hospital in critical condition. 

Area One detectives are investigating.