Venezuela's President Nicoals Maduro is blocking the U.S.-backed aid that is meant to weaken his control over the country and to enhance the standing of opposition leader Juan Guaido, who is recognized by more than 50 countries as the nation’s legitimate ruler.

Venezuelan President Nicolas Maduro’s forces fired tear gas and buckshot on activists trying to deliver humanitarian aid in violent clashes that left two people dead and some 300 injured.

Photos by AP photographers Fernando Vergara, Rodrigo Abd, Fernando Llano and Ariana Cubillos in Venezuela and Colombia.

Edited by AP Global Enterprise Photo Editor Enric Marti in New York.