A family friend says the person hit and killed by a Via Rail train last night was a teenager from Dorval.
The train was heading to Toronto from Montreal, when 16-year-old Tristan Morissette-Perkins was hit near Cornwall.
He was pronounced dead on the scene.
A 15-year-old boy who was with him, was taken to hospital with minor injuries and a 17-year-old boy with them was not hurt.
The three were from the Montreal area, but often spend weekends in the South Glengarry area near Cornwall.