Investigators said they have discovered an underground tunnel going from Ciudad Juarez into the West Texas city of El Paso.

Authorities said the tunnel is supported by wooden beams, equipped with electricity and has a ventilation system.

Mexican law enforcement officials released the mugshot of the Chihuahua State police officer who allegedly killed an El Paso teen buying tortillas in

This morning, various federal agencies and construction workers were seen from the Juárez side of the border working and checking on the tunnel on the U.S. side of the border. U.S. Border Patrol El Paso Sector confirmed to ABC-7 they will be pouring concrete on the U.

President Donald Trump's promises of mass deportations, which could bring batches of new arrivals fresh off the border bridges into Juárez, has Mexican law enforcement preparing to keep watch for potential trouble.

U.S. and Mexican forces worked together to shut down a cross-border tunnel used by smugglers to bring illicit cargo into the United States, authorities said.

As a former U.S. Border Patrol chief agent in Arizona and West Texas, Victor M. Manjarrez Jr., has come across his share of illicit cross-border tunnels.

US law enforcement agents carried out exercises using barbed wire and concrete blocks Friday at a crossing on the border with Mexico as tensions crept up ahead of President-elect Donald Trump's inauguration.

Local lawmakers are responding to the discovery of a sophisticated cross-border tunnel in El Paso's Lower Valley, connecting the city to Juarez.

General Jose Lemus, commander of Ciudad Juarez's military garrison, said the tunnel "must have taken a long time" to build, suggesting "it could have been one or two years".

Migrants who waited months to cross the U.S. border with Mexico learned their CBP One appointments had been canceled moments after Donald Trump was sworn in as president.

A secret tunnel discovered last week on the U.S.-Mexico border will be sealed by Mexican authorities, an army official in Ciudad Juarez said Saturday.