The Russian pledge on Monday to ship S-300 anti-aircraft systems to Syria comes in response to the Syrian military having mistakenly shot down a Russian Il-20 spy plane last week as it was targeting Israeli F-16s operating over the country.
Moscow has blamed the Israeli Air Force (IAF) for using the Russian Il-20 aircraft as cover, subjecting it to an attack by Syrian air defense systems.
"A modern S-300 air defence missile system will be transferred to the Syrian armed forces within two weeks", he said, significantly increasing the combat capabilities of President Bashar Al Assad's forces.
He also said he disagreed with the Israeli version of events concerning the downing of the Russian plane.
Shoigu went on television to say that Russian Federation is now going to go ahead with the shipment because "the situation has changed, and it's not our fault".
Putin spoke to Assad by phone Monday and informed him of the plan to provide the missiles, the Kremlin said in a statement.
"In regions near Syria over the Mediterranean Sea, there will be radio-electronic suppression of satellite navigation, on-board radar systems and communication systems of military aviation attacking objects on Syrian territory". On Sunday, the Israeli Defense Force said that the Israeli planes "did not hide behind any aircraft and... the Israeli aircraft were in Israeli airspace at the time of the downing of the Russian plane".
The downing of the plane forced Moscow to take "adequate retaliatory measures to increase the safety of Russian military fighting worldwide terrorism in Syria", Shoigu said in a televised address. On Monday, Defence Ministry spokesman Maj. Although Putin had sought last week to tamp down tensions over the downing of the plane, calling the incident an "accident", he told Assad that he "held Israel responsible" for the deaths of the 15 Russian service members, the statement said.
U.S. President Donald Trump and Russian President Vladimir Putin met in Helsinki, Finland in July and Bolton and his Russian counterpart met in August.
Speaking with reporters at the U.N. General Assembly meeting in NY on Monday, National Security Advisor John Bolton warned that "introducing the S-300s to the Syrian government would be a significant escalation by the Russians".
Russian Federation ordered its plane back to base.
Syria's skies, where regional and worldwide powers back different parties in the conflict, are increasingly crowded.
Deputy Foreign Minister Mikhail Bogdanov said that supplying S-300s to Syria is Russia's "right" and voiced confidence that this would not hurt Russian ties with Israel. Liability falls on Israel, the ministry said, because warning of the strike came just one minute in advance. Instead, the Israeli jets targeted the western province of Latakia, putting the Russian warplane in the line of fire.
Russian officials said Syria's outdated S-200 systems weren't sophisticated enough to identify the Russian plane as a friendly one.
Russian Federation launched its campaign in Syria to support President Bashar al-Assad in 2015 and though the involvement turned the tide of war in favour of Syrian regime forces.
On Sunday, Moscow formally accused Israel of "an act of criminal negligence" by failing to inform Russian Federation of an imminent attack on targets in Syria.
Concerns are rising in Idlib over the details of the deal and how it will be implemented.