Western diplomats say Iran has withdrawn its demand to continue research and development of uranium enrichment technology, seen by critics as a potential cover for developing nuclear weapons.
Speaking Sunday in Vienna, the diplomats say the International Atomic Energy Agency has received a letter from Iran agreeing to halt all enrichment efforts. The freeze is part of an Iranian deal with European countries aimed at easing international fears about Iran's nuclear ambitions.
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The United States has accused Tehran of using its enrichment efforts to develop nuclear weapons. Tehran has repeatedly denied the charges.
Diplomats from Britain, France and Germany, who brokered the freeze, had threatened to drop opposition to international sanctions against Tehran, if Iran reneged on the signed deal banning uranium enrichment activities.
Some information for this report provided by Reuters, AP.