Toronto police have a 16-year-old boy in custody after a stabbing outside Riverdale Collegiate in east Toronto.

Const. Tony Vella said an 18-year-old was stabbed in the back outside the school near Gerrard Street East and Jones Avenue just before noon yesterday. He was taken to hospital with a serious but non-life-threatening wound.

A suspect was arrested just west of the school on Gerrard Street. The school was not put on lockdown.