The Mexican Army uncovered a drug bunker across the border from Rio Grande City on Wednesday.
Mexico's National Defense Ministry (SEDENA) said soldiers were on patrol in the small town of Guardados de Abajo, located next to Camargo.
While on patrol, they came across an underground bunker with 488 bundles of marijuana.
The drugs weighed in at more than 3000 pounds.
The marijuana was turned over to authorities. No arrests were made.