The Russians and Americans agreed during Kerry's visit to Moscow to set up a conference of international players to end the crisis in Syria. Moscow wants to involve all the nations which took part in the Geneva conference on Syria last summer, and says without Iran's participation the conference cannot succeed.
"This issue is not related to the Syrians alone, as there are a number of foreign players involved at that crisis as well, and therefore, Iran's presence at that conference is of key importance for us," Lavrov said.
"In my talks with the US and French foreign ministers John Carry and Lauran Fabio aimed at solving the ambiguities about the combination of participating countries at Geneva II International Conference on Syria I gained their approval on need for revising their former decision," he added.
Earlier this month, Iranian Foreign Ministry Spokesman Seyed Abbas Araqchi announced that Tehran is likely to take part in the Geneva II Conference on Syria if the co-hosts, the US and Russia, invite it to the international gathering.
"If the Geneva II Conference is held and if Iran is invited, we will study our presence with a positive view," Araqchi said.
Araqchi underlined that Iran expects the Geneva II conference to find a solution acceptable to the Syrian people, and said, "Comprehensiveness is a necessity for the success of this conference, meaning that all the people who are influential in Syria and can help to the settlement of this crisis should take part in that meeting in a bid to guarantee its success."
The five permanent members of the UN Security Council as well as the European Union, Syria's neighbors Turkey and Iraq, and Kuwait and Qatar attended a meeting in Geneva on June 30, 2012, on Syria which failed to address the real problems in the crisis-hit country. Despite both the then UN mediator, Kofi Annan, and Russia's insistence on the inclusion of Tehran in the talks, Iran was not invited to the conference due to the United States' rigid opposition.