One of the fire engines sent to battle the blazing farm building on Collaton Lane in Tavistock early on Sunday morning ended up falling victim to the flames.
The £200,000 fire engine was parked about 20 metres from the building.
A tank inside the burning building containing diesel fuel ruptured and a stream of burning diesel ran out and down the lane outside. The burning fuel made its way underneath the fire engine, which was deemed unsafe and abandoned. Two other fire engines parked next to it were successfully moved to a safer location.
Two homes in the vicinity were evacuated and a 200m safety cordon was established around the burning building due to concerns about acetylene cylinders inside.
Devon & Somerset Fire & Rescue Service said that the safety cordon was still maintained and that they would continue to monitor the incident from a safe distance throughout the day, due to the volatile nature of acetylene cylinders.