In Venezuela, opposition leader Juan Guaido, who has been recognized by some 50 countries as the interim President, has warned the military for blocking humanitarian aid from entering the country. He said it is a crime against humanity.

The warning comes as international aid has taken center stage in a test of wills between Guaido and President Nicolas Maduro in which the military is seen as the pivotal player.

Medicine and food sent by the United States has been blocked for three days in Cucuta, Colombia after the Venezuelan military closed a bridge linking the two countries.