Media playback is unsupported on your device

Inside drug-smuggling 'super tunnel'

1 November 2013 Last updated at 07:49 GMT

A drug-smuggling tunnel equipped with electricity, ventilation and a rail system has been found connecting San Diego, California, and Tijuana, Mexico.

Authorities seized more than eight tons of marijuana and 325lb (147kg) of cocaine in connection with the discovery.

Speaking to the media, US officials described the passageway as "highly sophisticated" and suggested it had been constructed by "engineers and architects".

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.