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Manhattan Borough President Scott Stringer and Manhattan Councilman Ydanis Rodriguez called for an investigation into why metal detectors did not notice a knife used in one of the attacks.

They are also demanded a zero-tolerance policy on school bullying.

"Coming from teaching 14 years at a high school, a good high school, I can tell you that bullying is happening every day," said Manhattan Councilman Ydanis Rodriguez. "And unless an adult is there, really paying attention and looking to protect the victim, it can end in this type of situation."

Police say a 14-year-old told them he stabbed a 15-year-old 16-times with a steak knife, because the victim had been bullying him for a long time.

Investigators say both students attended the High School for Media and Communications on the George Washington High School Campus in Manhattan.

In Queens, a 17-year-old student was stabbed in the back with a steak knife at Newtown High School in Elmhurst on Friday.

Police are also investigating the Friday stabbing of a 15-year-old that happened a block away from I-S 302 in East New York, Brooklyn.

NY1 reached out to the Department of Education for a comment on this story and are awaiting a response.