A police inquiry has begun after an ambulance hit the body of a man on the A9 in Stirlingshire.
The vehicle struck Ian Christie's prone body on the road at the village of Plean in Stirlingshire.
Central Scotland Police said Mr Christie, 30, may have been struck by another vehicle shortly before at about 0445 BST on Sunday.
A car was seen at the side of the road with its hazard warning lights on. It drove off as the ambulance approached.
The ambulance crew, who were transferring a patient to hospital, felt a thump and got out to investigate.
They found the body of a young man in the road and tried to administer first aid.
Another ambulance was called but the man was already dead.
Police said they want to speak to anyone who was in the car spotted nearby.
A spokesman said the investigation was at a very early stage and it was still too early to say what exactly happened.
He added that the ambulance crew were being offered support following the incident.
The man's body was covered by a tarpaulin and was visible at the rear of the ambulance on Sunday morning.
The vehicle's hazard lights remained flashing, as accident investigators studied the scene.
The road was closed to motorists between the villages of Plean and Torwood to allow a full accident investigation. It was reopened late on Sunday afternoon.
The police spokesman said: "A car was seen in this area at the time parked at the side of the road with its hazard warning lights in operation. The car then drove off as the ambulance approached. The ambulance has then struck the man's body.
"We would like the driver of that car to contact us or anyone else with information about this incident to come forward and assist with our inquiries."