Ivanov was speaking at a security conference in Munich after Iran's Foreign Minister Manuchehr Mottaki confirmed that Iran has ended all voluntary cooperation with the United Nations' nuclear watchdog agency, the International Atomic Energy Agency (IAEA).
The move came one day after the board of the IAEA voted to report Iran to the UN Security Council, a move that could lead to sanctions.
A senior U.S. official at the Munich conference, Deputy Secretary of State Robert Zoellick, said Washington is determined to build a wide global coalition to put pressure on Iran.
(AP, AFP, dpa, Reuters)