June 3, 2004 -- WASHINGTON — FBI agents are focusing on a Pentagon intelligence-gathering unit in their probe into who told Iraqi exile leader Ahmed Chalabi that the United States had broken Iran's secret communications codes, The Post has learned. Word of the probe came as serious new allegations surfaced about the Iraqi National Congress, the exile group he heads. U.S. officials said the FBI counterintelligence investigation into the code breaking security breach is centered on a handful of civilian hard-liners in the Pentagon's Office of Special Plans, a policy- and intelligence-analysis shop set up after 9/11.
