Early on Tuesday morning an air and sea operation organised by Customs detected a semi-rigid powerboat without lights speeding towards San Pedro beach.
Police were able to stop the operation to unload drugs on the beach. Eleven large packages of hashish, weighing about 400 kilos were seized, as well as the seven-metre vessel itself.
In addition, a four-wheel-drive vehicle waiting to receive the goods was found.
Those responsible for the shipment fled into the darkness, and investigations continue into their current whereabouts.