"Any aircraft, including planes and drones belonging to the global coalition operating west of the Euphrates river, will be tracked by Russian anti-aircraft forces in the sky and on the ground and treated as targets".
On Monday, Russia's Ministry of Defense accused the US of "a cynical violation" of Syria's sovereignty, saying that Russian aircraft had also been carrying out combat missions in the same region - and that the coalition didn't use the deconfliction channels.
The U.S. -led global coalition fighting the Islamic State on Sunday said it shot down a Syrian regime fighter jet because it was attacking the U.S. -backed Syrian Democratic Forces militia near Tabqah.
The US and Russia, which had been providing air cover for Syria's President Bashar al-Assad since 2015 in his offensive against the Islamic State group, had a standing agreement that should prevent in-the-air incidents involving US and Russian jets engaged in operations in Syria.
On Sunday, the USA shot down a Syrian plane that had dropped bombs near the SDF south of Tabqa about two hours after SDF fighters were wounded in an earlier attack by pro-Syrian regime forces in Ja'Din.
It said that "pro-Syrian regime forces" had earlier attacked an SDF-held town south of Tabqa and wounded a number of fighters, driving them from the town.
The downing of the jet and Russia's response came as the US-led coalition and allied fighters battle to oust the Islamic State jihadist group from its Syrian bastion Raqa.
Syria's ally Russian Federation issued a warning on Monday, accusing the United States of military aggression against Syria "carried out under the cover of 'fight against terrorism'".
Until recently, pro-regime forces were focused on fighting rebels in western Syria but victories in Aleppo and elsewhere have freed them up to move east, pushing them into contact with the SDF. Those three instances were in self-defense as American in-theater commanders anxious about possible attacks by pro-Assad and pro-Iranian fighters on U.S. troops.
The Pentagon said Sunday a Syrian SU-22 dropped bombs on Coalition-partnered fighters near the town of Tabqah.
The downing of a Syrian government warplane by the United States is a step toward a unsafe escalation, and Moscow is warning Washington not to use force against Syrian government troops, a senior Russian diplomat told Interfax news agency on Monday. US warplanes carried out several low passes over the Ja'Din, halting the attack by forces loyal to Syrian President Bashar Assad. We call on Russian Federation to continue to use these measures.
The Prime Minister pointed to "deconfliction arrangements" with Moscow, which are created to prevent mid-air incidents between coalition and Russian planes operating in the crowded airspace over Syria.
The Syrian aircraft was destroyed, the Russian ministry said.