A drugs tunnel running for the a third of a mile under the U.S.-Mexico border was has been discovered by anti-narcotics agents.
The so-called 'narco tunnel' is believed to have been used by smugglers' transporting drugs across the border from the Mexican city of Tijuana to a warehouse 300 feet from the border in San Diego, California.
Astonishingly, the hidden tunnel was equipped with a rail track, electricity and ventilation system, the US Department of Justice said.