Trading standards officers found £1700 worth of illegal tobacco stashed behind a mirror in a shop in Cheltenham.
They visited the shop after an undercover officer bought a pack of counterfeit cigarettes.
The seizure included 215 packs of cigarettes and 91 pouches of hand rolling tobacco.
Counterfeit versions of Richmond, Mayfair and Amber Leaf were found alongside, Richman, Marlboro Gold and Cutters Choice.
Police say the mirror was held in place by electromagnets which was prised open with a lever.
Officers warn that counterfeit tobacco poses a serious health risk ''and undercuts legitimate law abiding traders who are trying to compete.''