Drug tunnels under the US border

- 1 suspect charged as feds shutter 2 San Diego-area smuggling tunnels. - 7 cross-border passageways detected in area in less than 4 years. Over the course of the last four days, members of the San Diego Tunnel Task Force, in collaboration with their enforcement counterparts in Mexico, have uncovered two sophisticated smuggling tunnels connecting commercial buildings in San Diego's Otay Mesa industrial park with warehouses in neighboring Tijuana, Mex.

This Oct. 30, 2013 photo released by U.S. Immigration and Customs Enforcement shows a tunnel inking warehouses in Tijuana and San Diego to smuggle drugs. The tunnel is equipped with electricity, ventilation and a rail system, U.S. authorities said Thursday, Oct. 31, making it one of the more sophisticated secret passages discovered along the U.S.-Mexico border. (AP Photo/U.S. Immigration and Customs Enforcement)

The entrance to a cross border illegal tunnel is lit by a lamp after it was found underneath a bathroom sink by the Mexican army inside a warehouse in Tijuana, Mexico, Thursday July 12, 2012. The 220-yard tunnel, presumably designed to smuggle drugs into the United States, was incomplete and had not yet crossed the border into San Diego. (AP Photo/Alejandro Cossio)

OTAY MESA - NOVEMBER 4: A Homeland Security Special Agent, who chose to remain unidentified, crawls through a drug tunnel found by agents at a warehouse near the U.S.-Mexico border on Thursday, November 4, 2010. Authorities confiscated over 30 tons of Marijuana in the tunnel, which connected to a warehouse in Tijuana,Mexico, and is one of the largest pot seizures in United States history. (Photo by Sandy Huffaker/Getty Images)

View of a trans-border tunnel and wagons found near the airport of Tijuana, Baja California State, in the Mexican border with San Diego in the US, on November 30, 2011. Mexican authorities have unearthed a 600-meter (1,800-foot) drug smuggling tunnel beneath the US border, the second such find in the same area this month. AFP PHOTO/Francisco Vega (Photo credit should read FRANCISCO VEGA/AFP/Getty Images)

Mexican Army soldiers custody the entrance of a clandestine tunnel connecting warehouses on either side of California's border with Mexico in Tijuana, Thursday, Nov. 4, 2010. Federal authorities in San Diego made one of the largest marijuana seizures in the United States, confiscating more than 20 tons of pot that was smuggled to the country through the underground tunnel that had lighting, ventilation and a rail system to send loads of illegal drugs into California. Mexican authorities also seized more than four tons of drug from the warehouse on their side. (AP Photo/Guillermo Arias)

An open bundle of marijuana seized in at a warehouse along the border between the United States and Mexico on Wednesday, Nov. 3, 2010, in San Diego. A 600 yard tunnel was discovered in the warehouse. U.S. authorities have discovered 20 tons of pot near a tunnel. (AP Photo/Lenny Ignelzi)

OTAY MESA, CA - JANUARY 30: Frank Marwood, with U.S. Immigration and Customs Enforcement, leads a tour through a drug tunnel found along the Mexico/USA Border at a warehouse January 30, 2006 in Otay Mesa, California. The tunnel runs 2,400 feet; is furnished with lighting, ventilation and equipment to pump out ground water and was used to funnel drugs into the United States from Mexico. (Photo by Sandy Huffaker/Getty Images)

OTAY MESA, CA - JANUARY 30: View of electrical wiring in a drug tunnel found along the Mexico/USA Border at a warehouse January 30, 2006 in Otay Mesa, California. The tunnel runs 2,400 feet; is furnished with lighting, ventilation and equipment to pump out ground water and was used to funnel drugs into the United States from Mexico. (Photo by Sandy Huffaker/Getty Images)

ALDERGROVE, CANADA - JULY 21: The property at the Canadian end of the cross border tunnel between U.S. and Canada is seen July 21, 2005 in Aldergrove, Canada. U.S. and Canadian law enforcement officers informed the media of an arrest of three men and about discovery of a drug smuggling tunnel leading from a house in Aldergrove, British Columbia under the border to a house in Lynden, Washington. Francis Devandra Raj, 30, Timothy Woo, 34, and Johnathan Valenzuela, 27, all of Surrey, B.C. were charged with conspiracy to distribute marijuana and conspiracy to import marijuana. (Photo by Don MacKinnon/Getty Images)

ALDERGROVE, CANADA - JULY 21: In this handout from Drug Enforcement Administration, the cross border tunnel between U.S. and Canada is seen July 21, 2005 between the Lynden, WA and Aldergrove, B.C., Canada. U.S. and Canadian law enforcement officers informed the media of an arrest of three men and about discovery of a drug smuggling tunnel leading from a house in Aldergrove, British Columbia under the border to a house in Lynden, Washington. Francis Devandra Raj, 30, Timothy Woo, 34, and Johnathan Valenzuela, 27, all of Surrey, B.C. were charged with conspiracy to distribute marijuana and conspiracy to import marijuana. (Photo by DEA via Getty Images)

401706 02: Mexican Federal Police officers check the interior of a chimney that serves as an entrtance to a tunnel discovered February 28, 2002 that was used to transport drugs between Mexico and California. The tunnel, approximately 1,000 feet long and four feet wide by four feet high, connects a private home in the mountains east of San Diego to a house in the Mexican border town of Tecate. It may have also been used to smuggle illegal immigrants. (Photo by SIete Dias/Getty Images)