“Negotiations between Iran and the P5+1 group must continue under any circumstances,” Ryabkov was quoted by AFP as saying on Tuesday.
Asked what Moscow's reaction to one-to-one talks between Tehran and Washington would be, Russia's chief nuclear negotiator said that Moscow will not oppose direct talks between the two countries.
"We will not have a word against this. Of course, we would hope we would be informed on the content of these arrangements,” he added.
Iran and the P5+1 group, have held several rounds of multifaceted talks with the main focus being Iran's nuclear energy issue.
Tehran has repeatedly voiced its readiness for negotiations based on mutual respect while maintaining that it will not give up its inalienable rights under any circumstances.
The United States, Israel and some of their allies have repeatedly accused Iran of pursuing non-civilian objectives in its nuclear energy program.
Iran argues that as a signatory to Non-Proliferation treaty and a member of International Atomic Energy Agency it is entitled to develop and acquire nuclear technology for peaceful purposes.
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