Iran did not immediately react Tuesday to the decision by the five veto-casting powers of the United Nations to refer Iran's nuclear file to the Security Council. At a London meeting that lasted into the early hours of Tuesday, envoys of Britain, China, France, Russia and the United States decided to call on the International Atomic Energy Agency to report Iran to the UN Security Council. But they also decided that the Security Council should wait until March to take up Iranian nuclear file after a formal report on Tehran's activities from the atomic agency. Iranian Foreign Ministry officials could not be reached for comment Tuesday. But the government is expected to be extremely displeased by the decision. Last week it sent Iran's top nuclear negotiator, Ali Larijani, to Moscow and Beijing to seek support against the Western drive to refer Iran to the Security Council.