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.

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.

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.