Stormont, Dundas & Glengarry Ontario Provincial Police officers are investigating a three-tractor trailer collision on Highway 401 in South Glengarry Township.
At about 12:21 a.m., Tuesday, police say a truck was travelling westbound on the highway when, for reasons under investigation, it was struck from behind by another westbound tractor trailer. A third tractor trailer then struck the rear of the second tractor trailer.
The drivers of all three trucks were taken to hospital; one with serious injuries, but all are said to be non-life-threatening.
SD&G OPP continue to investigate with the assistance of OPP Traffic Collision Investigators.
A section of westbound Highway 401 is closed to traffic with indicated detours in place, at exits 825 and 814.
Anyone having information on the above or any crime is asked to call SD&G OPP at 1-888-310-1122 or Crime Stoppers at 1-800-222-8477.