In March 2006 , the Calabrian Mafia ( ' Ndrangheta ) ordered a shipment of 9 tonnes of cocaine to be transported by a narco - submarine from Colombia to Italy .
The vessel was discovered by the Colombia police while Calabrian Mafia was still under construction .
In March 2006 , the Calabrian Mafia ( ' Ndrangheta ) ordered a shipment of 9 tonnes of cocaine to be transported by a narco - submarine from Colombia to Italy , but the vessel was discovered by the Colombian police while it was still under construction .