Mexican soldiers announced Tuesday they had discovered an unfinished tunnel in Tijuana, intended to smuggle drugs into the U.S.
Authorities found the tunnel, which stretched nearly 500 feet, beneath a house under construction. It sat about two blocks from federal police offices and near the Tijuana International Airport.
Nine people were arrested in the operation, and soldiers seized 44 pounds of marijuana from the illegal project, equipped with electricity and ventilation systems.
The tunnel had not yet reached U.S. soil before the bust, according to Immigration and Customs Enforcement spokeswoman Lauren Mack.