According to the superintendent, three students were injured, two suffered lacerations from a knife, and a third was punched in the face.
Three people were reportedly injured after a knife fight outside of Spring Valley High School in Rockland County on Friday afternoon.
The fight reportedly broke out in the school's parking lot at dismissal at 2:10 p.m.
School officials say the stabbing was a result of an argument between the students and that the fight was broken up by a school safety agent.
One student is now in police custody.
The student with the most serious injury was a 19-year-old who has not been identified.
An investigation into the incident is ongoing.