CARACAS, Venezuela, Nov. 16 (UPI) -- Venezuelan President Hugo Chavez criticized Colombia's President Alvaro Uribe over a new agreement that will give the U.S. military access to Colombian bases.

BOGOTA, Nov. 14 (UPI) -- Millions of referendum signatures in support of Colombian President Alvaro Uribe's second re-election bid are invalid, an electoral body says.

BOGOTA, Nov. 6 (UPI) -- Colombian President Alvaro Uribe is once again under fire over the contents of a security pact that permits wide-ranging U.S. access to Colombian military bases as part of counter-narcotic and counter-terrorism operations in South America.

BOGOTA, Sept. 9 (UPI) -- Colombian President Alvaro Uribe has signed a bill that clears the way for a referendum on changing the constitution to allow him to seek re-election for a third term.

BOGOTA, Aug. 31 (UPI) -- Colombia President Alvaro Uribe was diagnosed with swine flu following his participation in a regional summit in Argentina, his doctors said.

BOGOTA, Aug. 27 (UPI) -- Colombian President Alvaro Uribe says an investigation is under way into the massacre of 12 Awa Indians in the state of Narino.

BOGOTA, Aug. 17 (UPI) -- Mexican President Felipe Calderon offered to mediate between Colombia and Latin American states critical of its military cooperation with the United States.

BUENOS AIRES, Aug. 13 (UPI) -- Argentina has called a new summit of the Union of South American Nations to try and heal differences over the U.S. troop presence in Colombia. An earlier summit in Ecuador last weekend left the leaders deeply divided over the issue.

BOGOTA, Aug. 12 (UPI) -- Colombia has rushed fuel supplies to areas on the Venezuelan border facing fuel shortages due to a Venezuelan energy squeeze, ordered by Caracas to punish Bogota for its military cooperation with the United States.