Authorities arrested the boy Thursday. He faces charges including attempted murder, assault and criminal possession of a weapon.
The incident took place Monday evening at a Brooklyn playground on Fulton Street.
A 16-year-old boy was shot in the left arm, an 18-year-old man was grazed in the lower back, a 16-year-old boy was grazed in the right arm, and a 13-year-old girl was grazed in the back.
Young people have been shot in other recent incidents. Two children were among six victims in a shooting earlier in August. In July, a 4-year-old boy was killed during a gunfight at a basketball game in the Bronx.
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