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SAN DIEGO – Video released Thursday shows the inside of a sophisticated cross-border tunnel found near the Otay Mesa border overnight.

U.S. Customs and Border Protection agents, along with the Border Patrol and Immigration and Customs Enforcement, worked with Mexican authorities in the discovery of the roughly 800-yard-long tunnel.

The well-constructed tunnel has electricity, a ventilation system and railroad tracks used to transport large quantities of drugs, according to U.S. Attorney Laura Duffy.  This was the 10th tunnel of its kind to turn up at the San Diego-Mexico border.

The Mexican government released video showing the opening of the tunnel and the actual packages of wrapped drugs pulled from inside.

There were 12 tons of marijuana seized from Wednesday’s crackdown.  Two tons were in the building at 2587 Otay Mesa Center Drive and the remaining 10 tons of pot were inside the tunnel.

Two men, Isaias Enriquez-Acosta and Isidro Silva-Acosta, were arrested in Otay Mesa Wednesday and scheduled to be arraigned in federal court Thursday afternoon.  A total of 22 people were arrested in the sting.