The International Atomic Energy Agency (IAEA) says Iran is blocking access to some of its nuclear sites and continues to boost its stocks of enriched uranium.
Iran nuclear program
The United States is concerned about Tehran producing uranium metal as reported by the UN nuclear watchdog.
Iran's only nuclear power plant has been fixed, its manager said early on Monday, after two weeks of pause amid conflicting reports over an apparent technical issue.
Iran has been restricting UN nuclear inspectors' access to its main uranium enrichment plant at Natanz, Reuters reported citing diplomats.
Iran said on Monday it has yet to decide whether to extend a monitoring deal with the UN nuclear watchdog which ended last week, Reuters reported.
Tehran said it has no obligation to provide an answer to the UN nuclear watchdog, which demanded on Friday an immediate reply from Iran on whether it would extend a monitoring agreement that expired overnight, Reuters reported.
The Iranian centrifuge production site allegedly targeted in a drone attack Wednesday was reportedly on a list of targets that Israel presented to the Trump administration last year, The Times of Israel reported.
Iran's chief negotiator at international talks on its nuclear programe said late on Saturday he believed they could not conclude this week.
Washington told Tehran on Tuesday that it must let the UN atomic agency continue to monitor its activities, as they agreed on, or put wider talks on reviving the Iran nuclear deal at risk, Reuters reported.
The director of the international nuclear watchdog agency, IAEA, said Iran's lack of cooperation over the past few months prevents him from being able to assure the public that the country is not building a nuclear weapon.