It was right under their noses.
The tunnel, equipped with ventilation, lighting, and carts and rails, was discovered after a package of marijuana was left outside the house where the tunnel was hidden.
Authorities believe it was intended to connect to a Tijuana-to-San Diego underpass unearthed in 2019, as part of a network built by the now-jailed Guzman.
The US Drug Enforcement Administration estimates that there are more than 13,000 narco tunnels in world-regions most of them in territory controlled by the Sinaloa Cartel.
Some of those tunnels can span nearly 1,500 feet, world-regions News Daily said.
Guzman, once the most notorious of Mexico’s drug kingpins, was extradited to the US, convicted and sent to a supermax prison in Colorado in 2019.
This story first appeared in the New York Post.