ROME (TASS) -- Russia fully supports the idea of returning to the Iran nuclear deal in the form it was signed, without any additions or exemptions, Russian Foreign Minister Sergei Lavrov said on the sidelines of the G20 summit here Sunday. “Any additions and any exemptions are unacceptable for the Iranian side. And we fully support this approach,” Lavrov said. “If the sides agreed on something and if someone subsequently backtracked on the deal, it is necessary to seek returning to its full respect and observance,” he added.