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VIENNA/WASHINGTON: The UN nuclear watchdog said on Thursday it feared Iran may be working now to develop a nuclear-armed missile, as Washington warned Tehran of "consequences" for ignoring international demands to stop its atomic program.
In unusually blunt language, an International Atomic Energy Agency report for the first time suggested Iran was actively pursuing nuclear weapons capability, throwing independent weight behind similar Western suspicions.
The report also confirmed Iran had produced its first small batch of uranium enriched to a higher purity and had set aside the vast bulk of its low-enriched uranium stockpile for this purpose even though this seemed far in excess of possible civilian needs.
The developments will intensify pressure on Iran to prove it is not covertly bent on "weaponizing" enrichment by allowing unfettered access for IAEA inspectors and investigators, something it rejects in protest at UN sanctions.
The United States is already leading a push for the UN Security Council to impose a fourth round of sanctions on Iran because of suspicions it may be developing nuclear weapons and has received declarations of support from Russia, which has until now been reluctant to expand sanctions.
"We always said that if Iran failed to live up to those international obligations, that there would be consequences," White House spokesman Robert Gibbs told reporters aboard Air Force One as President Barack Obama flew to a political event.
Senior Obama administration officials, briefing reporters on the IAEA report, said they were struck by the number of significant technical problems Iran appeared to be encountering and the apparently slow growth of its uranium stockpile.
One of the officials, noting Iran had "increased the level of non-cooperation," said it may take Tehran longer to build a nuclear weapon because of the technical problems "but the pattern of behavior is one that I think is very disturbing."
Tehran says its nuclear program is meant only to yield electricity or radio-isotopes for agriculture or medicine. It took an opposing view of the report's conclusions.
"The IAEA's new report confirmed Iran's peaceful nuclear activities and the country's non-deviation toward military purposes," Iran's envoy to the IAEA, Ali Asghar Soltanieh, told the state news agency IRNA.
Intelligence reports
For several years, the IAEA has been investigating Western intelligence reports indicating Iran has coordinated efforts to process uranium, test explosives at high altitude and revamp a ballistic missile cone in a way suitable for a nuclear warhead.
In 2007, the United States issued an assessment saying Iran had halted such research in 2003 and probably not resumed it.
But its key Western allies believe Iran continued the program -- and the IAEA report offered independent support for that perception for the first time.
"The information available to the agency is extensive ... broadly consistent and credible in terms of the technical detail, the time frame in which the activities were conducted and the people and organizations involved," the report said.
"Altogether this raises concerns about the possible existence in Iran of past or current undisclosed activities related to the development of a nuclear payload for a missile."
IAEA's new chief, Yukiya Amano, is seen as more inclined to confront Iran than his predecessor, Mohamed ElBaradei, who retired on December 1.
"Now we see from (available intelligence) that certain activities may have continued after 2004," said a senior official close to the IAEA. "We want to find out from Iran what they've had to do with these nuclear explosive-related activities."
The US director of National Intelligence concluded last year that Iran would not be technically able to devise a nuclear weapon before 2013. But a new intelligence estimate is due soon.
Iran has dismissed the intelligence reports as fabrication but failed to provide its own evidence. Tehran has boycotted contact with the IAEA on the matter for 18 months.
The report, to be considered at a March 1-5 meeting of the IAEA's 35-nation board, said it was vital for Iran to cooperate with IAEA investigators "without further delay."