A report by the United Nations’ nuclear watchdog says Iran has accelerated its production of near weapons-grade uranium as tensions between Tehran and Washington rise after the election of U.S.

Iran's stock of uranium enriched to near weapons grade has grown sharply since it announced a dramatic acceleration in December and there has been no progress on resolving outstanding issues, two reports by the U.

According to the International Atomic Energy Agency, Iran is the only non-nuclear weapon state to enrich uranium to 60%, which is higher than what's necessary to produce nuclear power.