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A rudimentary, hand-dug tunnel connected the diggers to the Nogales drainage system through a "break-in" which can be seen in this photograph.
A look inside the rudimentary section of the tunnel.
Hecht emerges from the tunnel.
Supervisory Border Patrol Agent Kevin Hecht crawls the tunnel.
Supervisory Border Patrol Agent Kevin Hecht crawls through the drainage pipe looking for evidence left behind by the illegal tunnelers.
An interconnecting tunnel was discovered in a parking lot just across from the border in Nogales, Arizona, which has characteristics of both rudimentary and interconnecting tunnels. A vertical drill was discovered in the tunnel which the smugglers planned to use to break through when the tunneling was complete. The tunnel was discovered before it was completed and remediated to prevent future attempts by illegal smugglers.