A 16-year-old boy was knifed Monday in an unprovoked double-stabbing attack in Queens by four masked men, police sources told the Daily News.

The teen and a 24-year-old man were both stabbed in the back around 6:44 p.m. near the Roosevelt Ave. station on 74th St. and Roosevelt Ave. in Jackson Heights, cops said.

EMS transported the victims to Elmhurst Hospital , where they were in stable condition.

Police said the four attackers were all dressed in black clothing, and wore black ski masks.

There were no immediate arrests.

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