A person was airlifted to a Toronto-area trauma centre after a collision involving a dump truck and a passenger vehicle in Caledon Wednesday afternoon.

Ontario Provincial Police said the crash happened shortly before 4 p.m. at Mayfield Road and Bramalea Road. The occupant of the passenger vehicle suffered serious injuries and was transported by air ambulance for treatment.

No other injuries have been reported.

Police have closed Mayfield Road between Dixie Road and Torbram Road, along with Torbram Road at Old School Road. The closures are expected to remain in place for an extended period as investigators work to determine the circumstances of the crash.

The investigation is in its early stages.