Peru recalled its ambassador from Venezuela on Saturday over what it called President Hugo Chavez's persistent and flagrant interference in its upcoming presidential elections.
Bolivia's new left-leaning president signed a pact with Cuba and Venezuela on Saturday rejecting U.S.-backed free trade and promising a socialist version of regional commerce and cooperation.
Mexican lawmakers issued a declaration of support for immigrant protests planned in the United States on Monday and said they will send a delegation to Los Angeles to show their solidarity.
Some 100,000 people on Sunday protested in Argentina against Uruguay's plans to build two paper mills along the Uruguay River, a project opponents say will pollute the waterway dividing the two countries, police said.