Russian Foreign Minister Sergei Lavrov said that the meeting of foreign ministers of the "Six' international negotiators and Iran could begin at any time.
"We came close to a comprehensive agreement. A ministerial meeting could take place at any time to conclude this agreement. I will be ready to join my colleagues when my participation in Ufa will be finished," TASS cited him as saying.
There are no insuperable problems in the negotiations with Iran, the head of the Russian Foreign Ministry said.