Iran is to curb its nuclear activities under the terms of a November 24 deal agreed with six world powers, and both sides agreed then that the UN's International Atomic Energy Agency should ensure that Tehran is abiding by its commitments.
Speaking to reporters, IAEA chief Yukiya Amano said that the agency's 35-nation board "expressed its full support and gave its endorsement."
He said afterward that 10 nations had pledged financial backing, with some naming concrete amounts he did not specify. He said he was confident that the agency will meet its funding goal.
Among the countries coming forward was the United States. U.S. Chief IAEA delegate Joseph Macmanus said Washington intended to make "an appropriate financial contribution."
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The interim deal took effect Monday, when IAEA inspectors verified that Iran unplugged banks of centrifuges involved in its most sensitive uranium enrichment work on Monday as part of its commitment to limit activities that could be used to make nuclear weapons.
Both sides aim to use the six-month timeframe of the Nov. 24 pact to work on a final agreement. Iran says all of its atomic activities are peaceful but the United States and other skeptical nations seek permanent curbs on Tehran's atomic programmes.
Iran in turn wants a total lifting of international sanctions enacted since 2006 that have progressively crippled its economy.