The United States believes Russia’s decision to supplies S-300 air defense systems to Iran to be final.

“I’m not going to get into all the substance of the conversation. My understanding is that it was mostly focused on Middle East peace process. But you know our position on missile sales to Iran. They did announce that they had canceled plans – they announced in September 2010 that they’d canceled plans to transfer these S-300s to Iran,” State Department spokesman Mark Toner told a briefing in Washington.

“We viewed that as very positive steps and appreciated then their restraint in transferring arms sale – arms to Iran. So I’ll leave it there.”