The underground passage linking Ciudad Juarez with El Paso, Texas, was equipped with lighting and ventilation.

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

A man-made cross-border tunnel coming from Mexico was discovered on Thursday, according to the U.S. Customs and Border Protection. The discovery was made after U.S. Border Patrol Agents conducted an inspection on the storm drain of a tunnel crossing from Ciudad Juarez to the El Paso storm drain system.

A man-made smuggling tunnel has been discovered in El Paso, Texas last week. Federal agents from the U.S. Border Patrol and Homeland Security found the cross tunnel from Mexico on Thursday. The discovery came upon an inspection of a Mexican storm drain to El Paso's storm drain system.