President Hugo Chavez says he won't accept international mediation efforts aimed at easing tensions between Venezuela and Colombia.

Long-standing tensions between the South American neighbors have worsened in recent months over Colombia's agreement to give the United States military more access to its bases — a deal that Chavez sees as a threat to Venezuela.

U.S. and Colombian officials say the agreement is necessary to help fight drug trafficking and rebels who benefit from the illegal trade.

Chavez claims the deal could allow the U.S. soldiers to launch a military offensive against Venezuela.

Brazil offered last week to help mediate between Caracas and Bogota.

Chavez said Sunday, "We don't accept mediation."