According to a former U.S. official with firsthand knowledge of government intelligence, the CIA had obtained credible evidence, including Internet protocol addresses, linking Cuban agents to the prostitution claims and to efforts to plant the story in U.S. and Latin American media.The alleged Cuba connection was laid out in an intelligence report provided last year to U.S. government officials and sent by secure cable to the FBIs counterintelligence division, according to the former official and a second person with close ties to Menendez who had been briefed on the matter.The intelligence information indicated that operatives from Cubas Directorate of Intelligence helped create a fake tipster using the name Pete Williams, according to the former official. The tipster told FBI agents and others he had information about Menendez participating in poolside sex parties with underage prostitutes while vacationing at the Dominican Republic home of Salomon Melgen, a wealthy eye doctor, donor and friend of the senator.