"Moscow and Tehran will sign next week a contract for the supply of the S-300 to Iran," Hossein Dehghan said.
On August 14, Russian Deputy Foreign Minister Sergei Ryabkov said that "the decision on the possibility of delivery of the S-300 complexes to Iran has been made by the Russian President."
In an interview with Sputnik, Mahmud Shuri, head of the research group on Eurasian region with the Tehran Center for Strategic Studies, stressed the significance of the bilateral deal on the S-300 systems.
Praising Russian President Vladimir Putin for delivering on his promise related to the supply of the S-300 systems to Iran, Shuri touted "friendly relations" between the military-industrial bodies of the two countries.
He did not rule out the new deal containing an array of additional details given that plenty of time has passed since the signing of the previous bilateral deal on the S-300 supplies.
"I do not rule out that Russia will supply an upgraded version of the S-300 to Iran, and it will also ensure the delivery of spare parts, auxiliary equipment and instructors," Shuri said.
He also underscored the importance of the new agreement in terms of bolstering bilateral ties.
"Once we sign the deal, we will have every reason to say that the military-technical cooperation between Russia and Iran has overcome all the barriers and that both sides have opened a new page in bilateral relations," Shuri concluded.