On June 18, a fighter jet belonging to Syrian President Bashar al-Assad's regime bombed the USA -backed Syrian Democratic Forces in the Raqqa province, near the de facto ISIS capital.
And it has demanded a full account of why the USA military shot down the Syrian SU-22.
Frants Klintsevich, deputy head of the defense committee in Russia's upper house of parliament, said the defense ministry statement does not mean there will be war with the U.S.in Syria, but rather that Moscow will not accept attacks on its Syrian allies. The MINDEF provision warns about flights of the alliance aircrafts to the west of Euphrates River, which will be also considered combat targets, the mentioned agency said.
The downing of the warplane - the first time in the six-year conflict that the USA has shot down a Syrian jet - came amid another first: Iran fired several ballistic missiles Sunday night at IS positions in eastern Syria in what it said was a message to archrival Saudi Arabia and the United States.
This latest incident may indicate another escalation of the Syrian conflict and marks the first time the United States has downed a Syrian aircraft.
Unlike the Western alliance, which operates in Syria without the approval of its government, the Russian Aerospace Force was called by Damascus to support the fight against terrorist formations in late 2015.
The top US military officer said Monday that Washington and Moscow are in delicate discussions to tamp down tensions arising from the USA shootdown of a Syrian fighter jet, which the Russians called a violation of a U.S. A "hotline" for Russian and US military officials to talk about activity within the zones was established in 2015.
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The U.S. relies on the Syrian Democratic Forces (SDF) to reclaim territory from ISIS.
The Pentagon said Sunday a Syrian SU-22 dropped bombs on Coalition-partnered fighters near the town of Tabqah.
Russian deputy foreign minister Sergei Ryabkov also told the agency that a set of new USA sanctions that can be imposed on Russia will lead Moscow to retaliate.
The Dutch government is sending a military refueling plane to Kuwait to assist the USA -led coalition carrying out airstrikes against the Islamic State group in Iraq and Syria.
The shootdown was near Tabqa, a Syrian town in an area that has been a weekslong focus of fighting against IS militants by the SDF as they surround the city of Raqqa and attempt to retake it from IS. "That's why there's no threat of direct confrontation between Russian Federation and American aircraft".
SDF spokesman Talal Sillo said the government wants to thwart the SDF offensive to capture Raqqa.