Photo Credit: photo provided by U.S. Immigration and Customs Enforcement (Source: AP)
In late July, Homeland Security investigations found an incomplete tunnel stretching from Arizona to Mexico.
The tunnel appears to be “the most sophisticated tunnel in U.S. history,” authorities said.
The tunnel intended for smuggling ran from San Luis, Arizona, to a Mexican neighborhood and had a ventilation system, water lines, electrical wiring, a rail system and extensive reinforcement, federal officials said Thursday.
“This appears to be the most sophisticated tunnel in U.S. history, and certainly the most sophisticated I’ve seen in my career,” said Carl E. Landrum, acting chief patrol agent with the Border Patrol’s Yuma Sector.
A camera was sent 25 feet underground after federal agents discovered a sinkhole in the area of a tunnel investigation. Photos show the tunnel measures 3 feet wide and 4 feet high, according to an Immigration and Customs Enforcement news release.