The Border Patrol and Mexican authorities are investigating a 627-foot-long border tunnel discovered near Jacumba in East County.
The tunnel was discovered on Sept. 19 by Mexican state police and the Mexican military at a residence south of the border. U.S. authorities were then contacted to inspect the underground structure.
The Border Patrol reported Tuesday that the tunnel was 31 feet deep, three feet in height and roughly two and one-half feet in width. About half the length was in the United States.
The tunnel was incomplete, with an exit shaft on the U.S. side that did not break the surface.
Agents reported that there was a solar panel system used to run the electrical, lighting and ventilation systems in the tunnel, and a rail system installed the entire length.
Border Patrol said it was a sophisticated tunnel that was likely intended to transport drugs into the United States.
“Sophisticated tunnels take a lot of time and money to make,” Border Patrol Agent Tekae Michael told the San Diego Union-Tribune. “When we find them, they’re a pretty big deal.”
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