A Murray Bridge man is being questioned by police following a fatal interstate road crash.
The 36-year-old truck driver was travelling through Horsham on the way to Melbourne around 2am Thursday 11 July when his vehicle and a coach collided on the Western Highway, dislodging the trailer from his B-double truck.
The 60-year-old bus driver died at the scene while nine passengers were treated for serious injuries.
Assistant Police Commissioner Stephen Leane said authorities are working to determine exactly what caused the trailers to come away from the B-double.
Image of a B-Double Truck, ScottDavis (not the truck involved in accident)