Chicago crime: 18-year-old fatally shot in the head on city's West Side

An 18-year-old man was fatally shot in the head on Chicago's West Side Friday afternoon.

The shooting occurred in the 3900 block of West Arthington.

At about 4:34 p.m., the victim was on the sidewalk when an unknown suspect shot him in the head and neck, police said.

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He was transported to the hospital, where he was pronounced dead.

Area Four detectives are investigating.