According to documents, Posada stopped being a CIA asset in 1974, but there remained "occasional contact" until June 1976, a few months before the bombing. CIA had concrete advance intelligence, as early as June 1976, on possible plans by Cuban exile terrorist groups to bomb a Cubana airliner, and the FBI's attaché in Caracas had multiple contacts with one of the Venezuelans who placed the bomb on the plane, and provided him with a visa to the U.S. five days before the bombing, despite suspicions that he was engaged in terrorist activities at the direction of Luis Posada Carriles.