The U.N. nuclear agency is expected to say Friday that Iran is stalling the agency’s attempts to probe allegations that Tehran worked on nuclear weapons.

The confidential report from the U.N.’s International Atomic Energy Agency is significant in recording where the investigation stands for the U.S. and five other world powers seeking a nuclear deal with Iran. The U.S. and its allies say no final agreement will be reached until the IAEA issues a ruling saying it’s satisfied with its inquiry.

Half a dozen diplomats told The Associated Press about the confidential report.

Negotiators are aiming to seal a deal on Nov. 24 but the investigation is expected to drag on beyond that date.

Iran denies working on getting nuclear arms.

(AP)