Police are appealing for information after discovering a sophisticated cannabis factory set-up on an industrial estate on the outskirts of Keynsham.
They seized 40 mature plants worth more than £30,000 that were found growing in two old vehicles, a horse transporter and a box van, inside a warehouse unit.
Cannabis-growing equipment, including lights and heaters, was also seized and the drugs factory was dismantled.
The warehouse was empty when officers carried out a misuse of drugs warrant on October 18, and so far no-one has been arrested in connection with the find.
Anyone with information about the cannabis factory is asked to call Bath police on 101 quoting crime reference number 103948/13.