A bogus bargain shop along the California-Mexico border turned out to be the unlikely gateway to one of the most sophisticated drug-smuggling operations federal investigators have encountered in years, a 2,000-foot underground tunnel packed with electricity, ventilation, reinforced walls, a rail system, and ultimately more than a ton of cocaine bound for American streets.
A massive tunnel that was used for drug smuggling has been discovered by law enforcement, running from a store in San Diego and leading into Tijuana, Mexico. Federal officials say $45 million of cocaine has been trafficked through the ellaborate tunnel. #sandiego #mexico… pic.twitter.com/CkRapzlLz8
— CBS News (@CBSNews) June 2, 2026
How a “Discount Store” With Zero Customers Triggered A Federal Investigation
Federal agents with the U.S. Homeland Security Investigations Tunnel Task Force first set their sights on a warehouse operating under the name Buy 4 Less near the Otay Mesa Port of Entry in San Diego, directly across from Tijuana, Mexico, in December 2025. What tipped them off wasn’t a confidential informant or a phone tap. It was something far simpler: the store had almost no customers.
“During the surveillance, the activity around the Buy 4 Less location did not appear to be consistent with a normal retail location,” federal officials noted in their account of the investigation.
“For example, investigators observed minimal foot traffic from customers coming in and out of the Buy 4 Less store.”
Instead of shoppers browsing for deals, agents watched a rotation of apparent employees shuttling what appeared to be empty suitcases back and forth across the border — sometimes by car, sometimes carried by hand into Tijuana.
The Moment Agents Knew It Was Time To Move In
For months, investigators watched and waited. The operation only accelerated on May 29, when agents spotted workers loading “large, heavy items” into a white van parked outside the store. What followed read like a scene from a crime thriller.
A man on a bicycle rode up to the parked van, retrieved a key hidden near the gas cap, and maneuvered the vehicle back-to-back with a second van. A large truck then pulled up, and deep freezers stuffed with packages were transferred between the vehicles.
San Diego County sheriff’s deputies moved in and arrested those involved. Simultaneously, agents observed another truck being loaded with packages at the Buy 4 Less store, that vehicle was also intercepted shortly after leaving the lot.
Between the three vehicles pulled over that day, authorities recovered more than 2,269 pounds of cocaine.
Inside The Tunnel: A Remarkable Feat Of Criminal Engineering
With a warrant in hand, investigators entered the Buy 4 Less warehouse and found the tunnel’s exit concealed beneath the floor of a back storage room. What they uncovered was a sprawling underground corridor that stretched as far as 55 feet below ground, equipped with electricity, ventilation systems, reinforced walls, and a rail system to move product efficiently.
On the U.S. side alone, the tunnel extended just over 1,000 feet to the border. It continued for more than 800 additional feet on the Mexican side, for a combined length of roughly 2,000 feet, nearly four-tenths of a mile of secret underground infrastructure.
By the end of the operation, federal officials said more than a ton of cocaine with a street value exceeding $45 million had been seized.
Four Arrested, Jalisco Cartel Implicated
Authorities charged four men in connection with the operation: Gregorio Epifanio Hernandez Lopez, 29, of San Diego; Jose Jimenez, 32, of San Diego; Antonio Cortez, 18, of Mexico; and Brandon Escalante Sandoval, 26, of Mexico. All four face charges of distribution of a controlled substance, with Hernandez Lopez facing additional counts of constructing, financing, or using unauthorized tunnels and importation of a controlled substance. Each faces a maximum sentence of life in prison if convicted.
Federal officials also connected the tunnel directly to the Jalisco New Generation Cartel, one of Mexico’s most powerful and violent criminal organizations.
This investigation and seizure represent a significant blow to the Jalisco New Generation Cartel,” said Kevin Murphy, acting special agent in charge for HSI San Diego. “The discovery and dismantlement of this sophisticated cross-border tunnel, along with the seizure of more than a ton of cocaine, underscore the commitment and collaboration of Homeland Security Investigations and our Homeland Security Task Force partners.”
The Punchline That Stings
U.S. Attorney Adam Gordon offered a pointed summary of the defendants’ miscalculation: “For these defendants, it wasn’t a light at the end of the tunnel. It was lights and sirens.”
What This Bust Reveals About Modern Drug Smuggling
Cross-border tunnels are not new; U.S. and Mexican authorities have discovered dozens over the decades, but the scale and sophistication of this one underscores an uncomfortable reality: cartels continue to invest heavily in permanent, engineered infrastructure to move product at volume. A front business, a multi-room underground corridor, and a coordinated street-level distribution network represent a level of operational complexity that months of surveillance were required to fully map.
The case is being prosecuted by the U.S. Department of Justice through the Southern District of California.
