Avon and Somerset Police are appealing for information after a car was found on fire at the Brassmill enterprise trading estate in Brassmill Lane, Newbridge on Sunday evening.
Avon Fire and Rescue attended the scene and extinguished the blaze.
It is believed the fire could have been started deliberately.
The car, a Ford C-Max, was completely burned out.
Anyone who has any information or who saw anything suspicious in the area at around 7.30pm is asked to call police on 101 quoting reference number 3874/15.