TORONTO - Two 17-year-old boys were taken to hospital after a stabbing today at a Toronto high school.

Police say one boy stabbed just off the property at Bloor Collegiate Institute was rushed to hospital with life-threatening injuries.

A second victim suffered minor injuries.

An 18-year-old girl was arrested at the principal's office but was later released and now is deemed a witness.

Police are looking for a group of four or five males who had knives in their backpacks and are viewing surveillance footage.

They say the school is not under lockdown, and there is no threat to the public.