Police were first called to a single car fire near Bristol in the early hours of this morning. They were later called on to respond to other incidents of arson around the area.
Video footage shows the moment fire services arrived at the scene of one car fire.
Thick plumes of smoke can be seen rising from the vehicle.
Avon and Somerset Police said the vehicles were “deliberately set on fire”.
The fires also caused some fuel tanks to explode.
There have not, however, been any reports of injuries or damage to buildings.
A police spokesperson said: “The first call came in at around 1.30am on Sunday April 3, reporting a vehicle fire in New Road, Stoke Gifford.
“By 5.30am there were further reports, with up to 20 vehicles set alight in locations across Bradley Stoke, Little Stoke and Stoke Gifford.
“At about 3.45am more vehicles were on fire in a car park at Rolls Royce, Filton.
“Around 20 vehicles there were damaged as the fire spread.”
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Not all the owners of the cars that have been vandalised have yet been notified because the damage has made it difficult to identify the vehicles.
Anyone with dashcam or CCTV footage has been asked to contact the policy to help with their enquiries.
