A senior US official on Wednesday welcomed a tough stance taken by Russia on a nuclear plant it is building in Iran, saying it reflected concerns about the Iranian nuclear program which are shared by Moscow and Washington. US Deputy Energy Secretary Clay Sell told reporters on a trip to Moscow that "the actions taken by the Russian government ... are consistent with our common interests and common concerns as to what's going on in Iran." Russia said Monday that the Bushehr nuclear plant it is building in Iran would not be launched in September as earlier planned because of the Iranian payment delays. It also said that the uranium fuel needed to power the plant would not be shipped to Iran this month as earlier expected due to the launch's postponement. The statement angered Iranian officials, who denied any payment delays and accused Moscow of caving in to Western pressure to take a tougher line on Iran.