The drug-smuggling tunnel which is on average 70ft below ground and almost 6ft high and 2ft wide was reportedly built with a ventilation system, high-voltage power cables, and drainage.
According to the Mirror, the tunnel starts in an industrial area of the border city of Tijuana in Mexico, ending in a neighbourhood of San Diego, California. where its entrance was found covered by several sandbags.
It was discovered by authorities in August but has only now been revealed.
San Diego customs official Cardell Morant said: “The sophistication and length of this tunnel demonstrates the time-consuming efforts transnational criminal organizations will undertake to facilitate cross-border smuggling.”
It was also reported that El Chapo, whose real name is Joaquín Archivaldo Guzmán Loera sent some men to Germany to learn how to construct such underground passages to take millions of pounds’ worth of drugs into the US.