A 15-year-old M.M. Robinson High School student is being treated for serious injuries after being stabbed during an altercation outside the school Tuesday afternoon.

The boy remains in serious condition at McMaster Children’s Hospital in Hamilton, Halton police said. They have charged an 18 year old with aggravated assault.

Students reported that the teen was stabbed during a fight shortly before 3 p.m. in front of the school.

The suspect, who is not a student at the school, fled to a nearby residential neighbourhood.

Police said they spotted the suspect parked in a pickup truck on Donald Rd. around 4:14 p.m.

Kevin Whitehouse, 18, of Burlington is charged with aggravated assault.