U.S. and Mexican authorities have found two well-built drug-smuggling tunnels featuring power, lights and ventilation in the past week, reports USA Today. Wednesday night, the Mexican army found an unfinished, 600-foot-long tunnel that was started in a Tijuana bathroom and headed for a warehouse district in the San Diego suburb of Otay Mesa, where a similar tunnel was uncovered in November 2010. Saturday, U.S. agents found the exit of a 750-foot-long passageway in a small business in San Luis, Ariz., near Yuma. Mexican soldiers found the entrance in an ice plant in San Luis Rio Colorado, Sonora.
The Los Angeles Times said 156 border tunnels have been found since the early 1990s. “When you see what is there and the way they designed it, it wasn’t something that your average miner could put together,” Douglas Coleman, DEA special agent in Phoenix, told the Associated Press. “You would need someone with some engineering expertise to put something together like this.”