"There are plans that on September 22 a round of technical consultations of experts will take place in Vienna and on September 28, a P5+1 and Iran ministerial meeting is slated to be held in New York, but this schedule can theoretically change," Mikhail Ulyanov told RIA Novosti in an interview.
In July, Iran and the P5+1 group of international mediators, comprising Russia, the United States, China, the United Kingdom, France and Germany, signed a historic deal in Vienna to guarantee the peaceful nature of Tehran's nuclear activities in exchange for sanctions relief.
Under the agreement, Tehran, among other stipulations, is obliged to cut back its uranium enrichment and decrease the number of centrifuges in the country. Iran must also document and clarify past and present nuclear issues.