Russia is modernizing the S-300 air defense systems due to be delivered to Iran.

MOSCOW (Sputnik) � Russia will deliver to Tehran a modernized version of the S-300 air defense system that is currently being updated for the Iranian customers, Russian Presidential Aide Vladimir Kozhin said Thursday.

�It would be the S-300 system, which Iran specifically asked for. It has been a long time [since Russia and Iran signed the deal on S-300 systems delivery], the system has been partially upgraded, but certain elements are still being updated,� Kozhin told RIA Novosti.

In April, Russian President Vladimir Putin lifted the ban on S-300 deliveries to Iran under the 2007 contract, shortly after the P5+1 group of international negotiators and Iran reached a framework nuclear agreement.
By Sputnik News