The Colombian military has seized a 100-foot-long submarine capable of transporting eight tons of cocaine from Colombia to Mexico, news reports say.

The vessel was found in a jungle area in Timbiqui in southwestern Colombia on Sunday, according to a report from RTT News.

Colombian navy officials said the homemade sub had two diesel engines and sophisticated navigational equipment that would enable it to travel to Mexico while remaining up to 30 feet below the surface of the Pacific Ocean.

The vessel was set up for a crew of four but was unoccupied when found, RTT reported. Officials estimated it would have cost $2 million to build.

The submarine is just the latest example of crafts smugglers have made to try to get their illicit cargo past law enforcement.

Last year, VBS.TV got access to the Colombian naval base where many captured smuggling vessels are taken.