U.S. Border Patrol agents shut down the construction of a 2,918-foot-long tunnel connecting Tijuana and San Diego with the aid of Department of Homeland Security officials and Mexican authorities.

U.S. Border Patrol agents have uncovered a sophisticated underground tunnel stretching more than 1,000 feet into the United States from Mexico as part of a drug-smuggling operation in Southern California.

Agents have located and disabled an unfinished tunnel stretching from Tijuana into Otay Mesa, extending more than 1,000 feet into the U.S.