The Mexican Navy has seized more than 3.5 tonnes of drugs from a ‘narco submarine’.<br /><br />The drug in question is thought to be cocaine, though tests are still being carried out.<br /><br />The submarine measures 26 metres long and was found on Tuesday 27 June.<br /><br />Five people of different nationalities were arrested on board and taken to the city of La Paz in Baja California.<br /><br />Narco submarines have been used to smuggle drugs since at least the 1980s.<br /><br />These subs can either be fully or semi-submersible and are often able to avoid detection from radar and infra-red tracking.
