As RIA Novosti reports, assessing the possibility of the parties returning to the implementation of the JCPOA points, he said that "if Iran takes a political decision, this can be done relatively quickly."

"But we do not know if they are ready for this now," the American official said.

Also, according to him, the last three rounds of negotiations on the JCPOA in Vienna "helped (the parties) crystallize their positions."

Earlier, Russia's Permanent Representative to international organizations in Vienna, Mikhail Ulyanov, said that the Iranian side, during a meeting with the Russian delegation in Vienna, reaffirmed its commitment to achieving a quality result on the full restoration of the nuclear agreement.