The International Atomic Energy Agency said Iran has continued to meet its commitments under an interim nuclear agreement with the six major powers.
A monthly confidential UN nuclear agency report seen by Reuters on Monday said Iran was not enriching uranium above a fissile concentration of 5 percent. It also said Iran had not made "any further advances" in its activities at two enrichment facilities and a heavy water reactor under construction.
Under the November 2013 accord between Iran and the United States, France, Germany, Russia, China and Britain, the Islamic Republic halted uranium enrichment to a purity level of 20 percent and took other steps in exchange for some easing of economic sanctions.
The pact was negotiated to buy time for talks on a final settlement of a long-running dispute over Tehran's nuclear activities that Iran says are peaceful but some western countries claim may be aimed at developing a nuclear weapons capability.
After reaching a framework agreement in marathon talks in Switzerland earlier this month, the parties are trying to nail down the details of a final settlement by the end of June. The next round of talks starts today in Vienna. Deputy Foreign Minister Abbas Araqchi, US Under Secretary of State Wendy Sherman and European Union political director Helga Schmid will conduct this session of talks.
