Police are investigating a stabbing across from a school in Scarborough that sent three people to hospital.
Police say there may also be a fourth victim but that person has yet to come forward.
Officers were called to a plaza near Lawrence and Brimley for reports of a fight on Friday, around the time classes were letting out for the day.
David and Mary Thomson Collegiate Institute was in a hold and secure for about an hour.
Police say it appears that at least some of the victims retreated across the street to the school to seek help.
The Toronto District School Board confirms that one of the victims, a 17-year-old male, is a student.
There is no information on suspects.
With files from Tiffany Hendsbee