PHOENIX (AP) â€” An incomplete tunnel found stretching from Arizona to Mexico appears to be â€œthe most sophisticated tunnel in U.S. history,â€ 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.
â€œThis appears to be the most sophisticated tunnel in U.S. history, and certainly the most sophisticated Iâ€™ve seen in my career,â€ said Carl E. Landrum, acting chief patrol agent with the Border Patrolâ€™s Yuma Sector.
Homeland Security Investigations found the tunnel in late July. A camera was sent 25 feet (7.6 meters) underground after federal agents discovered a sinkhole in the area of a tunnel investigation, authorities said.
Photos show the tunnel measured 3 feet (about 1 meter) wide and 4 feet (1.2 meters) high, according to a U.S. Immigration and Customs Enforcement news release.
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