Meanwhile, Syrian Army forces supported by Russian air power and Iran-backed militias are closing in on the same positions, seeking to capture gas and oil fields before the Kurdish alliance can occupy them.
"A representative of the USA military command in Al Udeid (the United States operations centre in Qatar) was told in no uncertain terms that any attempts to open fire from areas where SDF fighters are located would be quickly shut down", Major-General Igor Konashenkov said.
The jets did not injure coalition forces, but the SDF said six of its fighters were wounded in the strike.
The Russian Defense Ministry has published "absolutely objective and specific evidence", including images from the aerial photographic survey, which directly proved the deployment and free movement of SDF militants and U.S. Special Forces in the referred-to areas, he added. Citing a Syrian military statement, Reuters said on Sunday that pro-government forces have captured at least 44 villages and towns in Deir Ezzor since launching an offensive against ISIS in the area roughly two weeks ago.
Ryabkov also said that Russian Federation wanted to strengthen the International Atomic Energy Agency and had not violated the Intermediate-range Nuclear Forces Treaty, rejecting allegations made against it by U.S. Secretary of State Rex Tillerson earlier this month. "They had a face-to-face discussion, laid down maps and graphics", said Army Colonel Ryan Dillon, a Baghdad-based spokesman for the USA -led coalition, adding it appeared to be the first meeting of its kind.
ISIS has controlled the Conoco gas field since 2014.
On Monday, Syrian government troops crossed the Euphrates river, sealing off the city on three sides.
The Syrian Civil Defense said one person was killed in Aleppo bombing, which it said targeted a cow farm. "We have to increase control over the foreign sponsorship of the unlawful activities of destructive forces", Matviyenko said.
The SDF declared on Saturday that it has formed a civilian council to govern the province of Deir al-Zor, with one hundred tribal leaders set to meet and elect permanent members of the administrative body.
US-backed Syrian fighters seized a second district of Raqa and launched a renewed assault on a base north of the city, as they pursued an offensive against the Islamic State group.