Two people are believed to have died after a car and truck collided in Culverden.
Police were called just after 8am to a scene on Mouse Point Rd.
Due to the severity of the crash, the police have not yet determined the number of the people who were in the car.
The truck driver was uninjured.
Power is out in the Culverden township, north to Mouse Point, with the estimated time it will be back on late-afternoon.
The road is closed and diversions are in place on State Highway 7 to Rotherham and Flintoft Mouse Point Rds and is expected to be reopened by 3pm.
Senior Sergeant Paul Reeves asked motorists to avoid the area or delay travel if possible.
The Serious Crash Unit is investigating.