EL PASO, Texas (KFOX14) — A 75-foot tunnel was discovered south of downtown El Paso, Tex. Thursday.
Chief Patrol agent Aaron Hull with Border Patrol El Paso sector said agents patrolling around a water treatment plant were notified of a makeshift tunnel north of the Sante Fe International Bridge.
Hull said agents were notified of the tunnel when employees from the Texas Department of Transportation discovered it.
TxDOT employees reported a "cave-in" that happened during construction along a roadway, according to border agents.
The tunnel was found at an El Paso Water Treatment Plant on Canal Road northwest of the Chihuahuita neighborhood.
Agents with the Confined Space Teams learned that the tunnel measured 25 yards into Mexico.
Hull says concrete is being poured to fill the tunnel and they are working with federal, state and local authorities to figure out what the tunnel was used for.
Authorities do not know how long the tunnel has been in place.
The public is encouraged to call the El Paso Intelligence Operation Center at 915-834-8561 if they have any information about this case.