VIENNA (AP) -- The U.N. nuclear agency said Wednesday it is "increasingly concerned" about a stream of intelligence suggesting that Iran continues to work secretly on developing a nuclear payload for a missile and other components of a nuclear weapons program.

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.

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