A man has died after a crash between the ambulance he was driving and a bus. Five other people, who were on the bus, were injured in the collision, which happened near York.
Police are investigating how the man, who was not believed to have been an ambulance driver or a paramedic, came to be at the wheel.
North Yorkshire police said that man who was driving the ambulance was pronounced dead at the scene.
The driver of the double-decker bus was taken to hospital with serious, but not life-threatening injuries, officers said.
A spokesman said: “The collision occurred at about 8.30pm on the A64 near the Flaxton junction, east of York.
“There were 16 passengers on the bus, five of whom have been taken to hospital for treatment. Their injuries are not believed to be life-threatening.
“The A64 remains closed while collision investigators examine the scene and will remain closed for some time. Motorists are asked to avoid the A64 near York.”