VIENNA — Iran is continuing to enrich uranium at increasing levels and is in breach of safeguards agreement obligations, the International Atomic Energy Agency has found.

In its a confidential report shared with member states and seen by journalists in Vienna on Friday, the UN nuclear watchdog expressed its "serious concern" that Iran continues to deny access to two locations of concern and not engaged in substantive discussions about possible undeclared nuclear material and nuclear activities.

The report detailed suspected activities and materials including “the possible presence... of natural uranium in the form of a metal disc” at a site that “underwent extensive sanitization and leveling in 2003 and 2004”, the report said, describing the third site.

“The (IAEA) director general calls on Iran immediately to cooperate fully with the agency, including by providing prompt access to the locations specified,” the report said.

“The possible use and storage of nuclear material at another location specified by the agency where outdoor, conventional explosive testing may have taken place in 2003, including in relation to testing of shielding in preparation for the use of neutron detectors,” the report added.

IAEA's March report showed Iran has enough low enriched uranium for one nuclear bomb. — Agencies