A crash has closed the eastbound lanes of Highway 401 near Townline Road in Cambridge.
OPP confirmed to CTV News in an email that emergency services responded around 12:30 to a collision involving eight vehicles.
The cause of the crash is currently under investigation.
One person was airlifted to hospital with serious injuries, with the extent of other injuries unknown.
Drivers should expect heavy traffic delays in the area and plan an alternate route if possible.
Investigators are on the scene as the investigation remains ongoing.
