A male believed to be in his late teens showed up at an Etobicoke high school searching for help after being stabbed in the turso on Thursday afternoon.
A temporary lockdown was issued at Michael Power High School after the victim arrived at around 3 p.m.
According to investigators, it is believed that the victim was stabbed in front of a row of townhomes located just north of the school.
Police said three people are in custody in connection with the stabbing and there are no outstanding suspects.
The victim was taken to hospital with serious injuries.
It is not known whether the suspects or the victim are students at the school.
