Russia voiced skepticism Tuesday about Iran's announcement of a dramatic expansion of its uranium enrichment effort, saying it had not received confirmation of the claim.
Iran said Monday it has begun operating 3,000 centrifuges - nearly 10 times the previously known number - in defiance of UN demands that it halt its nuclear program or face increased sanctions.
Russia was unaware, however, of "any recent technological breakthroughs in the Iranian nuclear program that would change the format of its enrichment effort," Foreign Ministry spokesman Mikhail Kamynin said in a statement.
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