These incursions appeared to be probing for weaknesses in Syria's new S-300 air defense missile system, deployed after the shoot down of a Russian IL-20 aircraft.
The incursions this morning have prompted Russia to issue a public warning about Electronic Warfare they intend to use in and around Syria.
Russia's Defense Minister, Sergey Shoygu, said that Russian forces in Syria will implement electromagnetic jamming for satellite navigation, air-borne radar and communication systems on aircraft.
The jamming will cover the Syrian coast and nearby regions over the Mediterranean, and will mainly target the Israeli warplanes.
A Russian expert told the Hal Turner Radio Show that electronic warfare operated by the Russian forces in Syria was mainly involved in collecting intelligence. However, after September 18, things have changed; the 'active mode' is now enabled.
"From the very moment an enemy fighter jet takes off, it is labeled as a target and assigned a number by the automatic control system. If the jet is thought to have unfriendly purposes, we initiate the electronic jamming which will disable the communication, navigation and GPS systems, as well as the ability to control and transfer data. In in a nutshell, the enemy plane will be gradually blinded", the expert explained.
"Moreover, the enemy plane shall be notified that it is being tracked. Thus, the only guarantee for it to return safe to its base is giving up the mission. Otherwise, the plane will face an electronic disaster", he added.
"After sending repeated warnings, if the pilot decides to enter the danger zone, all control systems of the plane will be completely disabled."
"If the pilot insists on carrying out a hostile action, then firing a surface-to-air missile is a plausible option", he concluded.