Man killed in truck crash near Hay

A truck driver was killed after his B-double rolled off a highway in the state's southwest.

Emergency services found the driver, believed to be in his 60s, trapped in the cabin of the truck, on the Sturt Highway, about 15km west of Hay, early on Friday morning. He died at the scene.

Initial investigations suggest the truck, carrying freight and tinned food, was travelling west.

A police spokeswoman told AAP it was thought the truck was coming around a bend when the incident occurred.

The road remains closed in both directions.