British Foreign Secretary Jack Straw has dismissed claims that the United States was preparing for military action against Iran, including nuclear strikes on suspected atomic weapons facilities. He told BBC television that the international community was right to view the Islamic republic's nuclear programme with "high suspicion" but "there is no smoking gun, there is no 'casus belli' (justification for war)"."We can't be certain about Iran's intentions and that is therefore not a basis for which anybody would gain authority to go to military action," he said Sunday. Straw was speaking following reports from the United States that President George W. Bush was studying options for military strikes, including possible targets. The April 17 edition of the New Yorker said they included Iran's underground uranium enrichment plant at Natanz and its uranium conversion facility at Isfahan. Straw dismissed the idea of nuclear strikes with bunker-busting bombs as "completely nuts" and questioned the reliability of the reports' source.