UN: Credible evidence Iran working on nuke weapons

In its report, the International Atomic Energy Agency said "many member states" are providing evidence for that assessment, describing the information it is receiving as credible, "extensive and comprehensive."

The restricted 9-page report was made available Friday to The Associated Press, shortly after being shared internally with the 35 IAEA member nations and the U.N. Security Council. It also said Tehran has fulfilled a pledged made earlier this year and started installing equipment to enrich uranium at a new location - an underground bunker that is better protected from air attack than its present enrichment facilities.

Enrichment can produce both nuclear fuel and fissile warhead material, and Tehran - which says it wants only to produce fuel with the technology - is under four sets of U.N. Security Council sanctions for refusing to freeze enrichment, which it says it needs for fuel only.