Two caravans were stolen from a caravan storage facility in Kentford.
Thieves removed concrete posts and fencing to get onto the site at some time during the evening of August 12 and upto 7am on August 13.
Three separate caravans were also damaged in an attempt to steal them.
Police want to trace the driver of a gold Toyota Avensis bearing Republic of Ireland number plates which was seen towing a caravan on the A14 in the early hours of August 13.
Contact police on 101.