Boy slashes fellow 13-year-old during fight outside NYC school: cops

A boy was slashed by a classmate during a heated Friday morning clash between the two 13-year-olds outside their Brooklyn school, cops said. 

The teens started arguing on a bus before the feud turned violent — with one slashing the other in the face outside Explore Charter School on Parkside Avenue near Nostrand Avenue in Prospect Lefferts Gardens, authorities and law enforcement sources said. 

The victim was taken to the Kings County Hospital Center with non-life-threatening injuries, police said. 

The young suspect — whose name wasn’t released because he is a minor — was arrested and charged with assault and criminal possession of a weapon, cops said. 

A knife was recovered at the scene, sources said.

The violence comes after at least two other Big Apple teens were hurt in school-related assaults this week. 

On Wednesday, one 12-year-old girl allegedly knifed another in the hand inside Pathways College Preparatory School on 204th Street near 111th Avenue in Hollis, Queens, police and sources said. 

And on Monday, a 14-year-old boy was slashed in the chest during a dismissal-time fight with a 13-year-old student outside M.S. 246 Walt Whitman in Flatbush, Brooklyn, cops said. 

The wounded teen ran back inside his school before he was taken to the Kings County Hospital Center, where he was listed in stable condition, cops and sources said.