U.S. Immigration and Customs Enforcement/AP
View of a recently-discovered tunnel linking warehouses in Tijuana and San Diego to smuggle drugs, Oct. 30, 2013.
The tunnel is equipped with electricity, ventilation and a rail system, U.S. authorities said Oct. 31, making it one of the more sophisticated secret passages discovered along the U.S.-Mexico border.
Paul Caffrey/U.S. Immigration and Customs Enforcement/AP
Agents inspect some of more than eight tons of marijuana and cocaine seized from a tunnel designed to smuggle drugs from Tijuana, Mexico, to San Diego.
Lenny Ignelzi/AP
U.S. Immigration Custom Enforcement Agent-In-Charge Derek Benner describes elements of a 1,760 foot cross-border tunnel used for drug smuggling in the Otay Mesa area of San Diego, Oct. 31, 2013.
Paul Caffrey/U.S. Immigration and Customs Enforcement/AP
U.S. Immigration and Customs Enforcement agents in a tunnel designed to smuggle drugs from Tijuana, Mexico, to San Diego, Oct. 31, 2013.
Lenny Ignelzi/AP
A Border Patrol vehicle passes by the front of the industrial park office where a 1,760 foot cross-border tunnel used for drug smuggling was busted by federal authorities in the Otay Mesa area of San Diego Thursday, Oct. 31, 2013.
Lenny Ignelzi/AP
U.S. Attorney for the Southern District of California, Laura Duffy talks about the investigation leading to the discovery of a 1,760 foot cross-border tunnel in San Diego.
Lenny Ignelzi/AP
U.S. Attorney for the Southern District of California Laura Duffy, right, and an assistant walk down the loading dock ramp of a business where authorities found the 1,760 foot cross-border tunnel.
Lenny Ignelzi/AP
San Diego Police Chief William Lansdowne, second from left, and other law enforcement officials approach the door of an office where authorities discovered a 1,760 foot cross-border drug smuggling tunnel, Oct. 31, 2013.
Paul Caffrey/U.S. Immigration and Customs Enforcement/AP
Bales of some of more than eight tons of marijuana and cocaine seized from a tunnel designed to smuggle drugs from Tijuana, Mexico, to San Diego, Oct. 31, 2013.
Paul Caffrey/U.S. Immigration and Customs Enforcement/AP
Agents with bales of some of more than eight tons of marijuana and cocaine seized from a tunnel designed to smuggle drugs from Tijuana, Mexico, to San Diego, Oct. 31, 2013.
