From the material press service Israeli military department:
The IDF Air Force aircraft did not hide behind any other aircraft, as they were in Israeli airspace at the time when Syrian air defenses shot down Russian IL-20. The collapse of the Russian aircraft as a result of the actions of the Syrian air defense is a serious tragedy, and we share the grief of those who have lost relatives and friends, as well as the pain of all Russian citizens.
Such statements were published in the Twitter account of the Israeli military department after a briefing, which the day before the official representative of the department, Major General Igor Konashenkov, held in the Ministry of Defense.
One of the tweets states that the mechanism for preventing airborne conflicts was activated in the appropriate timeframe. Added that the mechanism worked for 2,5 years.
It is noted that the commander of the Israeli Air Force gave the Russian colleagues a detailed report on the events of that fateful day. The report states that the Syrian air defense forces’s C-200 was used "already after the Israeli F-16 had completed strikes against Hezbollah and the IRGC (Islamic Revolutionary Guard Corps) in Syria."
In other words, the data of means of objective control of Israel is challenged by the Ministry of Defense of the Russian Federation, and the data of Russian means of objective control is challenged by Israel.