US find 'longest' drug tunnel on California-Mexico border

US authorities have uncovered what they believe to be the longest ever cross-border drug trafficking tunnel connecting Mexico and California, a statement said.

Estimated to span more than 730m, it contains an elevator, as well as lights and rail and ventilation systems, the US Attorney's Office for the Southern District of California said Wednesday.

The narrow tunnel connects a house in Tijuana, Mexico, to a commercial lot in Otay Mesa, California, where the exit is a 0.9m diameter hole that, at one point, was hidden from view by a dumpster, it said in a statement.

Inside the tunnel, federal agents found 68 bales of marijuana weighing 743kg, with another 1 430 pounds hidden in the dumpster.