Los Angeles, California (CNN) - U.S. authorities have discovered about 30 tons of marijuana that were part of a smuggling operation using a tunnel under the California-Mexico border, officials said Wednesday.
The 600-yard tunnel - which features a rail system, lighting and ventilation - connects a warehouse in Tijuana with one in the Otay Mesa industrial area of San Diego, said U.S. Immigration and Customs Enforcement spokeswoman Lauren Mack.
About 26 tons of marijuana had been transported through the tunnel to San Diego, and 10 of those tons were intercepted Tuesday by authorities as a tractor trailer was transporting the load from the Otay Mesa warehouse, officials said. About five tons were found by the Mexican military inside the Tijuana warehouse and the tunnel, officials said.
Drug cartels on the border have become so powerful and sophisticated in recent years that many Mexican communities and areas along the border are patches of uncontrollable violence, experts have said.
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