( CNN ) -- U.S. border patrol agents Friday found a crude tunnel , apparently used for smuggling , underneath the concrete-lined Rio Grande River near El Paso , Texas . The discovery came as authorities were investigating suspicious activity in the city storm drain system and came upon a juvenile from Mexico with 200 pounds of marijuana . `` This is another example of smuggling organizations actively recruiting juveniles to smuggle narcotics and humans , '' said sector Chief Randy Hill . `` These organizations are exploiting the youth of Mexico and putting their lives in danger . '' Mexican authorities were called in to locate the tunnel entrance on the Mexican side .
Crude is found at U.S.-Mexico border . Discovery as authorities found Mexican youth with 10 grams of marijuana . Mexican police called to find entrance on Mexican side .