Paramedics had to evacuate an ambulance after the vehicle caught fire on the A69 in north Cumbria.
There were no patients on board when the incident happened last night.
It's thought an electrical fault caused the fire which badly damaged the vehicle.
Traffic was delayed on the A69.
More top news
Film stars including Kelly MacDonald and Jessica Hynes are in the Lake District this evening for the world premiere of Swallows and Amazons
Emma Jesson brings you Sunday night's forecast
It was the 10th visit from the youngsters, who live in the contaminated area near the derelict Chernobyl nuclear power station