The Archdiocese of Mexico said on Sunday that Mexican companies expressing interest in working on a border wall in the United States are betraying their country.

The archdiocese said in an editorial that Mexican companies have expressed willingness to supply materials or work on the wall proposed by US President Donald Trump. Mexico opposes the wall.

The editorial was titled, Treason against the Homeland, and said that "what is most surprising is the timidity of the Mexican government's economic authorities, who have not moved firmly against these companies."