Provincial police say a “G1 license holder operating a vehicle without insurance in winter weather driving conditions” was behind the wheel for a collision that injured four people on Sunday evening.

The crash, which the OPP said resulted in one person being ejected from the vehicle, happened at around 7:30 p.m. in the eastbound collector lanes of Highway 401 at Port Union Road.

According to police, the vehicle’s driver struck an end treatment between the express and collector lanes.

Four people were taken to hospital, two of whom had life-threatening injuries.

The collector lanes at Morningside Avenue as well as the on-ramps at Port Union and Kingston roads were closed as police investigated, but have since reopened.

The investigation is ongoing.