Investigators are working to figure out the cause of an ambulance that caught on fire south of Thompson.

Manitoba RCMP says the vehicle was headed from Keeyask to Winnipeg and the fire started at the back of the ambulance.

The driver was the sole occupant of the vehicle and was able to escape the ambulance without injury.

The Vale Mine Fire Department and Thompson Fire and Emergency Services attended the scene and extinguished the fire.

RCMP says the ambulance is a total loss.