From now on, all aircraft and drones of the coalition detected west of the Euphrates River will be tracked by Russian air- and ground-based air defense systems as targets, the ministry warned. SDF fighters are aligned with the Americans in the campaign against the Islamic State group.
The U.S. Central Command said, however, that the Syrian plane bombed U.S. -backed forces and the action against it was "in accordance with rules of engagement and in collective self-defense of Coalition partnered forces".
In the first high-level USA public comments about the situation, Marine Gen. Joseph Dunford, chairman of the Joint Chiefs of Staff, said Monday the former Cold War foes are in delicate discussions to restore normalcy to communications and maintain focus on fighting IS instead of each other.
Meanwhile, the US -backed opposition fighters said Assad's forces have been attacking their positions in the northern province of Raqqa and warned that if such attacks continue, the fighters will take action.
On Monday morning, the area where the regime and SDF fighters clashed was quiet and the US-backed alliance was continuing to battle IS inside Raqa, said the Syrian Observatory for Human Rights.
Russia's defence ministry has announced it is ending US-Russian co-operation in Syria, which had been created to prevent a direct conflict between the two powers.
Suspect shot after explosion at Brussels train station
The Belgian capital's Grand Place, a major tourist site, was evacuated along with the station about 200 metres (656 feet) away. Brussels police continue to reassure the public that "everything is under control" All trains and metros have now been halted.
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.
Spicer said Monday that Washington would work to keep lines of communication open to, in his words, "de-conflict potential issues".
Russia said its warplanes were flying over Syria at the time of the shootdown and the USA failed to use the existing deconfliction channel between US military officers at al-Udeid air base in Qatar and Russian officers at Hemeimeem air base.
Earlier Russian Deputy Foreign Minister Sergei Ryabkov compared the downing to "helping the terrorists that the U.S. is fighting against".
"I'm confident that we are still communicating between our operations center and the Russian Federation center", Dunford said at the National Press Club in Washington.
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