Russia has fulfilled all its obligations on the supplies of S-300 missile systems to Tehran, Iranian Ambassador to Russia Mehdi Sanaei said on Oct. 26.

"The S-300 issue has been already closed, everything has been supplied and delivered," Sanaei told reporters answering a question if Russia has fully met its commitments under the deal.

Earlier this month, a representative of the Federal Service for Military-Technical Cooperation told TASS Russia had completed the supplies of S-300 air defense systems to Iran.

In late August, Iranian Defense Minister Hossein Dehghan said Tehran expected the deliveries to be completed in a month.

The contract for the delivery of S-300 to Iran was signed in 2007 but was suspended in 2010. In the spring of 2015 Russian President Vladimir Putin lifted the ban on S-300 supplies to Iran and in November that year the contract came into force.