A weapons cache has been discovered in a disused Polish ambulance parked up at L’Eliana in Valencia province.
The Policia Nacional found two assault machine guns, with a large amount of ammunition, plus guns in a joint operation with Polish colleagues to bring down an arms and drugs trafficking gang.
Four people, including the ring-leader, have been arrested in a three-phase operation
The gang transported weapons from Poland to sell on the black market in Spain.
A network of Polish-registered vehicles with hidden compartments travelled between the two countries using different drivers.
The group exported marijuana and other drugs to Poland and returned with guns and ammunition.
A finca in La Pobla de Vallbona was being converted into an indoor marijuana farm with the capacity to grow 1,500 plants.
Police seized a drone to provide security at the property, along with eight vehicles.
The investigation which started in late 2021 is still continuing with further arrests not being ruled out.