"Repeated combat actions by US aviation under the cover of counterterrorism against lawful armed forces of a country that is a member of the United Nations are a massive violation of global law and de facto a military aggression against the Syrian Arab Republic", the Russian Defense Ministry said.
The incident has similar hallmarks to a June 8 shoot-down, when a US F-15 destroyed a pro-regime drone after it dropped what turned out to be a dud bomb near US-backed local forces.
The US military said the drone was Iranian-made but it was unclear who was operating it.
Russian Federation condemned the USA action and in retaliation suspended a hotline meant to prevent such incidents.
"ADF operations in Iraq will continue as part of the coalition".
The coalition's alliance with armed groups that have previously been involved in anti-regime operations means that the formation of a unified front against ISIS in Syria is extremely unlikely.
The Russian military also said it would stop using the "deconfliction" channel that was established to avoid conflicts as coalition and Russian warplanes operated in Syria's airspace.
Earlier this month, the US shot down another pro-regime drone in the same area after it dropped munitions near coalition forces.
About 4000 more US troops to go to Afghanistan
More troops for Afghanistan? In late April President Trump delegated to Mattis the authority for troop levels in Iraq and Syria . Three U.S. soldiers were killed and another was wounded in eastern Afghanistan this weekend in an attack claimed by the Taliban.
Moscow, for its part, on Monday suspended a crucial safe flights over Syria deal with the US under a memorandum and called the downing of the jet a "violation" of the Syria's sovereignty and global law.
In Syria, Russia announced on Monday that it had suspended a military hotline with U.S. forces and threatened to shoot down coalition planes that flew west of the Euphrates river after the United States shot down a Syrian-piloted bomber that flew too close to a US-supported force advancing on the Isis bastion of Raqqa in northern Syria.
Following the downing of the Syrian warplane, the Russian government vowed to treat any coalition aircraft in Syria as an enemy target.
The Democratic Senator also said that the U.S. president had no authority to act on his own to engage in a war in Syria and that he must gain permission from Congress.
But his remarks came amid questions whether the strike had been effective.
Moscow's warning came after the U.S. took down a Syrian military plane.
On Monday, the Iranian Revolutionary Guard Corps demonstrated some of its military prowess by launching ballistic missile strikes from western Iran against ISIS targets in the Syrian city of Deir ez-Zour, according to The Guardian.
Sharif says the missile launch reflects Iran's "military power" though Iran has no intention of starting another war. Israeli security officials said Monday they were studying the missile strike to see what they could learn about its accuracy and capabilities.
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