A 17-year-old boy is facing charges in a triple stabbing near a Scarborough high school on Friday, and police said they are looking to speak with several other suspects.

The stabbing happened near David and Mary Thomson Collegiate Institute, close to Lawrence Ave E. and Rushley Dr. at around 3:30 p.m. that day, police said in a release issued Tuesday.

A group of boys had been sitting on a wall in the area when a motorcycle with two male riders pulled up to the group. Police said the rear passenger got off the bike, allegedly pulled a knife from under his clothing, and stabbed one of the boys.

As two of his friends tried to intervene, an unspecified group of people allegedly rushed from behind a nearby McDonald’s and joined in the fight, according to both police and a witness who spoke with the Star on Friday.

Police said the group allegedly held down the two friends as the suspect stabbed them several times.

Both the motorcycle riders and the group helping them managed to flee the scene before police could apprehend them.

All three stabbing victims, two of whom had life-threatening injuries, were rushed to hospital. Friends of the victims later told the Star at Sunnybrook Hospital that they were in “okay” condition.

David and Mary Thomson Collegiate Institute was put on hold-and-secure for about an hour. The Toronto District School Board later said that one of the victims, a 17-year-old boy, was a student at the school.

Police arrested the 17-year-old boy late Monday night. He’s facing three counts each of aggravated assault and assault with a weapon, as well as one of possessing “weapons dangerous to the public peace,” carrying a concealed weapon, and failing to comply with probation.

He appeared in court on Tuesday morning. The Youth Criminal Justice Acts prohibits news organizations, including the Star, from publishing his name because he is under the age of 18.

Police haven’t said how many other suspects there are in the case.

With files from Victoria Gibson