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.

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 Saturday, adding that its construction was under investigation.