On Tuesday, the US Department of State Undersecretary for Political Affairs Thomas Shannon said Washington would use its veto power in the Security Council to block the possible sales of the fighter jets to Iran.

“The sale of Su-30 fighter aircraft is prohibited under UNSCR 2231 without the approval of the UN Security Council and we would block the approval of any sale of fighter aircraft under the restrictions,” Shannon said, referring to the UN resolution.

Head of the Russian Foreign Ministry’s department for non-proliferation and arms control, Mikhail Ulyanov, dismissed the claim.

“Such deliveries are not prohibited, they are allowed, and this follows from the text of the resolution,” the Interfax news agency quoted him as saying.
 
Resolution 2231, adopted by the Security Council on July 20, 2015, endorsed a nuclear agreement between Iran and the P5+1 group, comprising Russia, China, France, Britain, the US and Germany.

Shannon claimed that under the resolution, such weapon deliveries “require the submission of relevant notification to the Security Council and this notification’s endorsement by the Security Council.”

Ulyanov said Moscow has not forwarded such a notification to the Security Council so far.

Political analysts say Resolution 2231 does not prohibit Iran from buying fighter jets, and its language is not legally binding and cannot be enforced with punitive measures.

Su-30 is a multirole advanced fighter aircraft for all-weather, air-to-air and air-to-surface deep interdiction missions.

Iran and the P5+1 finalized the nuclear agreement, dubbed the Joint Comprehensive Plan of Action (JCPOA) in Vienna, Austria, in July last year. They started to implement the JCPOA on January 16, 2016.

On Tuesday, a senior Russian diplomat also said Moscow would begin the first shipment of its S-300 air defense missile systems to Iran in the coming days.

"I don't know if this will happen today, but they (S-300 missiles) will be loaded (for shipment to Iran)," Interfax quoted Zamir Kabulov, a department chief at the Foreign Ministry, as saying.

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