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When the incident initially happened, Chicago police said officers in an unmarked squad car attempted to "conduct an investigatory stop" on a group of people near a double-parked car in the area when one of the individuals fled the scene "while in possession of a firearm."

Officers chased the man into a vacant lot and one of them opened fire, striking the suspect in the upper body, according to officials.

Police said officers immediately rendered aid before the man was rushed to Mount Sinai Hospital in critical condition. Chicago Fire Department officials said he was in his 20s.