Tunnel originating in Mexico discovered under Nogales, Ariz., authorities say

Another tunnel discovery in Nogales

TUCSON, Ariz. — Another border tunnel has been found on Arizona’s border with Mexico.

U.S. Border Patrol agents working in cooperation with local and federal law enforcement agencies found a tunnel Friday in Nogales, under the southbound lane at the DeConcini Port of Entry.

The weight of a passenger bus caused a collapse in the road.

Border Patrol agents, with assistance from Mexican law enforcement, discovered an unfinished tunnel originating in Mexico.

From Oct. 1, 2009, to July 31, 2010, five tunnels were identified within the Tucson Sector. During the same period last year, 20 tunnels were discovered.

Authorities say smugglers mostly use tunnels to move drugs to the U.S.