Russia has started the delivery of its S-300 air missile systems to Iran, Russian military-technical cooperation’s presidential aide Vladimir Kozhin has been quoted as saying to a Russian news agency on Thursday.
"The contract is being implemented, (deliveries of S-300s) are starting," Kozhin said.
The agreement for the delivery of S-300 missile defence systems was first signed in 2007 but was banned in 2010 by former Russian President Dmitry Medvedev, after the UN Security Council imposed sanctions to block the sale of high tech weapons.
Iran filed a suit in Geneva and demanded billions of dollars for the cancellation of the $800 million shipment by Russia.
The shipment of the air missiles was confirmed by Russia and Iran after international sanctions on Iran were lifted in early 2015, after it signed a historical nuclear deal with six world powers.
On November, officials from the two countries finalized the contract for the delivery and started the process to complete technical details.
Israel and the US were opposing the $800m missile deal as it came before UN’s decision to lift sanctions on military weapon sales.
They also expressed concerns that Iran would hand the missile systems to its ally Syrian regime leader Bashar al Assad.
On April, Israeli Prime Minister Benjamin Netanyahu had expressed his disappointment in a phone call to Russian President Putin, a day after the ban was lifted.
Saudi Arabia also called on Russia not to supply the defence missiles to Iran.
However, Russia defended itself saying that S-300 missile systems were only for defence purpose, therefore would comply with United Nations arms embargo.
The S-300 has multiple functions including targeting jets and shooting down other missiles at the same time. The engagement radar of the missiles are able to guide 12 missiles and engage with six targets at the same time.