Two people were sent to the hospital after a collision on Friday morning in the southbound lane of Highway 400 outside of Innisfil.
Provincial police say two vehicles were involved in the crash, with one rolling over.
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Police say the first vehicle was reportedly driving erratically, which resulted in a collision.
The two occupants in the rolled-over vehicle were taken to the hospital.
Police say charges are pending, and clean-up of the highway is continuing.