Iran admitted on Sunday it was heading for UN sanctions over its nuclear programme, warning it would take "appropriate measures" in retaliation for any punitive action. "Imposing sanctions has repercussions on both sides, regionally and internationally. They already know this. If they impose sanctions we will take appropriate measures," foreign ministry spokesman Mohammad Ali Hosseini said.His comments came as momentum picked up among world powers to find agreement on sanctions against Iran, after the UN Security Council rapidly secured agreement for action against North Korea over its announced nuclear test. Asked if such "regional repercussions" would have an effect on the Strait of Hormuz, a vitally important channel for transporting oil, Hosseini replied: "it depends on the kind of sanctions."