Israel has said that the anti-aircraft missile system has not deterred it from conducting military strikes in Syria and that there are no restrictions its ability to conduct aerial strikes in Syria against Iranian backed targets.
But Israel's Prime Minister Benjamin Netanyahu last month told Russian Federation his country must continue to hit hostile targets in Syria to prevent Iran from establishing a military presence across the border.
The US has said it hopes Russian Federation will allow Israel to continue air strikes in Syria, Washington's envoy said Wednesday.
Both Iran and Russian Federation have been supporting Syrian President Bashar al-Assad's government purge foreign-backed terrorist groups from the country. Israel regards the Islamic republic as its most risky enemy and has staged repeated air raids against its military and allied militia deployed in Syria.
The inflammatory move comes after a Russian II-20 surveillance plane was accidentally struck down by Syrian government anti-aircraft fire in September.
Although satellite images show the S-300s have been deployed in Syria, Israeli officials have said they are thought to not yet be operational.
The Israeli air force has staged repeated air raids against Syrian military bases that it claims are used by Iranian military advisors.
Whilst Russia and Iran have backed the Syrian government in the civil war, Israel has joined the USA and other allies, including Turkey and Saudi Arabia, in supporting rebel groups who oppose President Bashar al-Assad.
Elkin's comment came after last month Defense Minister Avigdor Liberman rejected reported demands by Moscow that Israel give the Russian military additional warning before carrying out airstrikes in Syria. According to some reports, Moscow has repeatedly turned down requests by Israeli Prime Minister Benjamin Netanyahu for a meeting with Russian President Vladimir Putin.
Israel is inflaming the region with its military actions particularly in Syria, Russian Foreign Minister Sergey Lavrov said this week, signaling that tensions remain between Moscow and Israel.
"The Russians, having been there before, would not in fact withdraw, but you've got four other outside military forces - the Israelis, the Turkish, the Iranian and the American - all operating inside Syria right now. It's a risky situation", Jeffrey said.
Iran has made it clear that it would stay in Syria as long as Damascus requests. Turkey has staged two incursions into northern Syria since 2016 aimed at curbing the role of Kurdish forces that the United States is supporting against Islamic State. "Actions would undoubtedly take place, should (an attack) occur, against the launchers used to attack Israeli territory or Israeli planes", Elkin said.
USA policy is to ensure the enduring defeat of Islamic State, work on a solution to the conflict under the terms of United Nations Security Council resolution 2254 and ensure all Iranian-commanded forces leave Syria entirely, he said.