MOSCOW, Sept. 28 (Xinhua) -- Moscow has called for restraint over the recent missile and nuclear events in Iran, the Interfax news agency reported Monday citing an unnamed source from the Foreign Ministry.

    "It is important not to yield to emotions. We must calm down and, what is the most important, start efficient negotiations," said the source when commenting on the Iranian test launches of intermediate-range missiles.

    The unnamed source also said that Russia is "waiting for results of the Geneva meeting of the Sextet political directors and expect Iran to make some proposals."

    Concerning Tehran's claim about its second uranium enrichment plant, the source said the information "must be verified and analyzed objectively."

    "Only then can steps be taken," he added, noting the importance of commonsense prevailing over emotions.

    Meanwhile a senior member of the Russian parliament said on Monday that it is possible for the international community to tighten sanctions against Iran, the RIA Novosti news agency reported.

    "If one has to choose between war and tighter sanctions, the latter is preferable," said Mikhail Margelov, head of the upper house's international affairs committee.

    Moscow has been calling for diplomatic approach over further sanctions concerning Iran's nuclear program.

    However, Russian President Dmitry Medvedev said during his last week's trip to the United States that "sanctions are not the best way to deal successfully with Iran, but if we run out of all other options, we could launch sanctions based on international law."

    Some media reports have interpreted such sayings as a sign that brings Moscow closer to the West in assessing the Iranian nuclear threat.

    Iranian local English-language Press TV reported Monday that the Islamic Revolution Guards Corps (IRGC) has successfully test-fired several missiles including Sejil and Shahab-3 in recent two days, as part of a war game dubbed The Great Prophet IV that started on Sunday.

    Iran earlier informed the International Atomic Energy Agency (IAEA) of the existence of a second uranium enrichment facility, deepening concerns that it has a secret program to produce nuclear weapons.

    The United Nations Security Council has so far levied three sets of sanctions on Iran. Officials from five permanent U.N. Security Council members -- the United States, Russia, China, Britain and France -- plus Germany are to discuss with Iran its latest package of proposals on global issues in Geneva on Oct. 1.

    The United States and other Western powers suspect the program aims to produce nuclear-weapon material, but Tehran contends that the program has no military component and has steadfastly rejected calls to halt the effort.

Special Report: Iran Nuclear Crisis