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US police find 'major drug tunnel' under Mexico border

US officials say they have uncovered a major drug-smuggling tunnel under the border with Mexico and seized an estimated 14 tons of marijuana.

Customs officials said the tunnel linked warehouses in Tijuana, Mexico, and San Diego's Otay Mesa area, in California.

Dozens of such tunnels have been found in recent years as US police have cracked down on overland smuggling.

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