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.

Iran’s stockpile of uranium enriched just below the level needed for nuclear weapons surged more than 50% in the last three months, defying mounting pressure on the Islamic Republic to curb its atomic activities.