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PHILADELPHIA (CBS) — A 13-year-old boy has been hospitalized after police say he was stabbed by a female student with a pair of scissors at a North Philadelphia school on Friday morning.

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Police were called to William Dick School on the 2400 block of West Diamond Street, just before 11 a.m.

Police say the eighth-grade boy got into a fight with the 13-year-old girl in the science classroom around 10:50 a.m. Police say the girl then produced a pair of adult-sized scissors and stabbed the boy in the upper torso.

“During the course of today’s class around 10:52 a.m., the female student produced a pair of scissors and she stabbed the male student in the upper abdomen area,” Philadelphia Police Capt. Sekou Kinebrew said.

The boy was taken to Hahnemann Hospital in stable condition. Police arrested the girl shortly after the incident.

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Police can’t say yet if the girl had the scissors concealed or grabbed them in the heat of the altercation. They were not school-issued scissors.

“As far as the scissors, we’re told the scissors are used for the class,” said Kinebrew. “The teacher apparently brought the scissors in because apparently not everybody has a pair and because some kids have a larger hand size.”

School officials say the incident happened while classes were changing and the teacher followed proper procedures for handling a fight.

“Our teachers are trained in de-escalation, and so this teacher did deploy some of those methods,” said Philadelphia School District spokesman Lee Whack.

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Regular school activities continued after the incident.