This Wednesday, Oct. 21, 2015 photo released by Mexico's Federal Police shows an underground tunnel that police say was built to smuggle drugs from Tijuana, Mexico to San Diego in the United States. Mexican federal police said the tunnel extends about 2,600 feet (800 meters) and is lit, ventilated, equipped with a rail car system, and lined with metal beams to prevent collapse. (Mexico Federal Police via AP)
This Wednesday, Oct. 21, 2015 photo released by Mexico’s Federal Police shows an underground tunnel that police say was built to smuggle drugs from Tijuana, Mexico to San Diego in the United States. Mexican federal police said the tunnel extends about 2,600 feet (800 meters) and is lit, ventilated, equipped with a rail car system, and lined with metal beams to prevent collapse. (Mexico Federal Police via AP)

 

San Diego – Mexican authorities said Thursday they seized about 10 tons of marijuana in an elaborate tunnel with a rail car system that extended well into San Diego and was designed to smuggle drugs into the U.S. from Tijuana.

The discovery on Wednesday marks one of the longest and more sophisticated clandestine tunnels found on the U.S.-Mexico border.

The passage was 9 feet deep and about 2,600 feet long — about three-quarters of that distance in Tijuana and the rest in San Diego. It was lit, ventilated and built with metal beams to prevent collapse.

It was unclear whether any drugs got through the tunnel or if it had an exit yet in the U.S.

Lauren Mack, a spokeswoman for U.S. Immigration and Customs Enforcement, declined to comment.

It was also unclear which drug trafficking organization began the engineering feat.

The region is largely controlled by Mexico’s Sinaloa cartel, whose leader Joaquin “El Chapo” Guzman escaped from a maximum-security prison in Mexico in July through an elaborate tunnel.

Mexican police said in a press release about the drug tunnel that 16 people were detained on suspicion of drug trafficking and had told authorities that they had ties to a criminal group that operates in the state of Jalisco — an apparent reference to the Jalisco New Generation cartel, which controls that part of western Mexico.

 A handout picture provided by National Safety Commission (CNSC) of a policeman guarding 10 tons of Cannabis confiscated during an operation where a 800 meter tunnel to traffic drugs to USA was discovered in Tijuana, Mexico, on 22 October 2015. 16 suspected traffickers were arrested and 10 tons of Cannabis confiscated.  EPA
A handout picture provided by National Safety Commission (CNSC) of a policeman guarding 10 tons of Cannabis confiscated during an operation where a 800 meter tunnel to traffic drugs to USA was discovered in Tijuana, Mexico, on 22 October 2015. 16 suspected traffickers were arrested and 10 tons of Cannabis confiscated. EPA

 

The people detained were 21 to 50 and were caught off-guard when Mexican authorities arrived at a Tijuana warehouse with a search warrant, police said. No shots were fired.

The drugs were wrapped in 873 packages covered with plastic and tape, police said.

Dozens of tunnels have been found along the U.S.-Mexico border in recent years — the most sophisticated equipped with hydraulic lifts and electric rail cars.

The San Diego-Tijuana region is popular because its clay-like soil is easy to dig with shovels and pneumatic tools, and both sides of the border have warehouses that provide cover for trucks and heavy equipment.

As reported by Vos Iz Neias