Police have arrested a 17-year-old student after a stabbing at St. Edmund Campion Catholic Secondary School in Brampton, Ont. on Friday.

The victim, a 16-year-old boy, was taken to hospital with multiple, non-life-threatening injuries, Brampton paramedics said.

Student Nathan Albis said he saw the victim coming out of a washroom.

"He was screaming 'Ouch, I'm bleeding. Help me,'" Albis told CBC News. "It looked like the wounds were in his lower body, his torso I guess."

Police said the biggest challenge was making sure everyone was safe while they searched for suspects. Nearly 2,000 students attend St. Edmund Campion.

The suspect and victim both attend the school and, according to students, know each other.

"I'm pretty sure they had some sort of beef going on," said one student. "I'm really surprised it led to this … it shouldn't have happened inside the school."

Peel Regional Police say there could be more suspects and are reviewing surveillance footage.

The school went into lockdown following the incident and neighbouring schools followed in a hold and secure.

It is the GTA's second stabbing at a school in two months, after Hamid Aminzada was killed at North Albion Collegiate.

Earlier this month two students were shot to death near Don Bosco in Etobicoke.