The teen was struck in the shoulder when someone fired a barrage of bullets on 1154 Nostrand Avenue in Prospect Lefferts Gardens.
Police used bottles and cups to mark the casings scattered on the pavement.
The other victims were 18 and 26. Both were shot in the stomach, but their injuries are less serious.
There is no word yet on a motive for the shooting or whether the victims were the intended targets.
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