It happened just before 2:30 p.m. at John Barry Elementary School on the 5900 block of Race Street.
Police said a 12-year-old female student stabbed an 11-year-old male classmate in the head with scissors.
Officials said the sixth-grade student was taken to the Children's Hospital of Philadelphia with a cut to the back of his head.
The boy is said to be in stable condition at the hospital
Police said the girl is in custody.
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