WATCH: See inside a smuggling tunnel under the U.S.-Mexico border

U.S. law enforcement officials have discovered a smuggling tunnel that stretches from Tijuana, Mexico, to San Diego, California.

In the video above, the passage, located some 18 metres underground, has reinforced walls, a rail and ventilation system, and electricity.

U.S. authorities said they found the 530-metre path during a federal drug investigation, which led to charges against six people.

Watch the video at the top of this article.

 

• 

  This undated photo provided by Homeland Security Investigations shows the inside of a cross border tunnel between Mexico's Tijuana into the San Diego area. Authorities announced on Monday, May 16, 2022, the discovery of the underground smuggling tunnel on Mexico's border. (Homeland Security Investigations via AP)