Federal authorities in the U.S. and Mexico shut down an incomplete, cross-border smuggling tunnel yesterday during a bi-national border sweep in Nogales, Ariz.

Nogales Station Border Patrol agents working with immigration and Homeland Security investigators and federal police from Mexico, located an incomplete tunnel being dug west of the DeConcini port of entry early tin the morning.

The tunnel extended five feet into the United States but did not open up into the country. The discovery was made during a bi-national patrol designed to systematically check existing infrastructure for vulnerabilities. Mexican authorities took one individual into custody who was actively digging.