US border patrol agents have uncovered and dismantled a sophisticated underground tunnel stretching from Tijuana, Mexico to San Diego, California—a secret passage used for large-scale drug smuggling. The US Customs and Border Protection (CBP) described the tunnel as a potential tool not only for drug traffickers but also for terrorist groups, sparking renewed national security concerns.
The uncompleted tunnel, which extended more than 1,000 feet into US territory, was detected in April and successfully sealed on Wednesday 18 June 2025, according to an official CBP statement. Authorities say the discovery highlights a growing shift in how criminal and potentially terrorist organisations attempt to exploit underground routes to bypass heavily monitored borders.
