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.

A hidden cross-border tunnel used to smuggle migrants and contraband between the US and Mexico will be sealed, Mexican border officials have said.

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".

A tunnel along the border wall in Texas, going from Mexico into the U.S. and believed to have been used by smugglers, was discovered last week.

A secret tunnel used to smuggle migrants and contraband between Mexico and the United States has been discovered and will be sealed, according to Mexican border authorities. The 300-metre-long tunnel connects Ciudad Juarez in Mexico with El Paso, Texas, two neighbouring cities on either side of the US-Mexico border.

A secret 1,000ft-long ‘narco’ underpass between Mexico and the US will be sealed off ahead of Donald Trump’s inauguration in Washington DC on Monday. Running between the two cities of Ciudad Juarez in Mexico and El Paso in Texas,

A clandestine tunnel discovered on the US-Mexico border allowing entry from Ciudad Juarez into the Texan city of El Paso will be sealed by Mexican authorities, an army official said