Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. September 10, 2011 Venezuela Protests US Sanctions VOA News Venezuela's President Hugo Chavez speaks during a cabinet meeting at Miraflores Palace in Caracas August 25, 2011. Photo: Reuters Venezuela's President Hugo Chavez (file photo) Venezuelan President Hugo Chavez challenged U.S. President Barack Obama Friday to prove U.S. claims that four Venezuelan officials are involved in drugs and arms trafficking. The U.S. accused the four men Thursday of providing arms, security and training to FARC, Colombia's main rebel group. The Venezuelans were placed on the U.S. narcotics kingpins list, freezing any assets they might have in the U.S. and barring Americans from doing business with them. Washington identified the men as General Cliver Alcala, lawmaker Freddy Bernal, Amilcar Figueroa, a delegate to the Latin American Parliament, and intelligence official Ramon Madriz. President Chavez says by putting the Venezuelan men on the blacklist, the U.S. might be laying the groundwork to eventually place Venezuela on a list of countries that support terrorism. Venezuelan authorities delivered a formal complaint about the sanctions Friday to the U.S. embassy. Some information for this report was provided by AP, AFP and Reuters. .