The United States accuses Iran of secretly developing nuclear weapons, but Iran says its nuclear program is only for producing power.
Lavrov said Moscow believes the Iranian nuclear issue can be resolved within the International Atomic Energy Agency, the UN's nuclear watchdog. But Rice said referral of Iran's nuclear program to the UN Security Council -- which could result in economic sanctions against Iran -- remains an option.
Rice is expected to meet with President Vladimir Putin before flying to London later today for talks with British Prime Minister Tony Blair.
For news and analysis of Iran's nuclear program, see RFE/RL's "Iran's Nuclear Program" microsite.