Mexican authorities discovered an underground tunnel in the border city of Tijuana that may connect it to the United States.
The country's Attorney General's Office (FGR) said it executed a search warrant in the neighborhood of Nueva Tijuana.
The structure was equipped with lighting, ventilation and an electronic transport system. It is almost 900 feet long and a depth of more than 20 feet.
The FGR said the warrant was executed as part of an investigation into alleged violations of the country's firearms and explosive laws. Authorities said the tunnel could have been used for storage and the trafficking of arms, explosives and unlawful drugs.
During the search, agents seized ammunition, suspected methamphetamine and marijuana, as well as cellphones and documents, officials said. "The tunnel probably connects with a known street in San Diego, California," the FGR said in a statement.
The agency described the discovery as "a direct blow" to transportation routes and logistical networks used by criminal organizations involved in drug trafficking. The tunnel and the seized materials remain under federal custody as prosecutors continue the investigation.
Several such structures have been found across the border over the years. In January, a man from Texas was sentenced to almost three years in prison for using a cross-border tunnel to smuggle migrants.
The man in question, 20-year-old Oscar Ivan Carrillo, worked with other co-conspirators to create tunnels connecting to a storm drain.
He and others guided migrants through the tunnel to reach El Paso, from where a box truck with a trap door drove over a manhole cover, according to Border Report. Migrants would then climb out the tunnel and through the trap door without being detected.
The tunnel was found in January 2025. Carillo was named in a four-count indictment in April and arrested in June. In November he pleaded guilty to one count of conspiracy to use a border tunnel and has now been sentenced to 33 months in prison.
