Two teens, 16 and 18, were stabbed on a Queens street Monday – with a 14-year-old boy busted in connection to the vicious attack, cops said. 

The 18-year-old victim was stabbed once in the back and the 16-year-old boy was knifed a single time in the right leg during the altercation around 6:45 p.m. at 21st Avenue and 74th Street in Astoria Heights, police said. 

Both victims were taken to Elmhurst Hospital Center, where they were listed in stable condition, cops said. 

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A 14-year-old boy was busted in connection to the knifing and charged with gang assault, police said. 

His name was not released because he is a minor.

The motive for the violence remained unclear Tuesday.