On March 15, the war entered its eighth year.
Russian air attacks have targeted US-backed Syrian Democratic Forces and coalition advisers east of the Euphrates River in Syria’s Deir Az Zor province, according to the Pentagon.
Saturday’s incident wounded several SDF fighters, but the coalition advisers were unharmed, it said in a statement.
“Russian munitions impacted a location known to the Russians to contain Syrian Democratic Forces and coalition advisers,” the Pentagon said.
Russia’s military spokesman earlier denied targeting SDF, an alliance of Arab and Kurdish fighters.
“This is not possible. Why would we bomb them?” Igor Konashenkov, Russia’s military spokesman, told AFP news agency at the Hmeimim base, Moscow’s main outpost for its air operations in Syria.
The attack was first reported by the SDF in a statement, which accused the Syrian government – backed by Russian air force – of trying to obstruct its fighters as both of the forces battle the Islamic State of Iraq and the Levant (ISIL, also known as ISIS) group in oil-rich Deir Az Zor province – ISIL’s last major foothold in Syria.
Such attacks “waste energies that should be used against terrorism … and open the door to side conflicts”, it said.
“Whether it’s the SDF, Daesh, or any illegitimate foreign forces … we will work against them until all our land is liberated,” she told the channel, which is run by allied Lebanese movement Hezbollah, referring to ISIL using its Arabic acronym Daesh.
“It’s the role of Russia and America to see that this confrontation doesn’t take place,” she said.
Syria’s crisis erupted with protests demanding the removal of Assad in 2011, but it has since morphed into a complex, multi-front war that has killed 330,000 people and displaced millions.
ISIL, also known as ISIS, which in 2014 overran swaths of territory across Syria, is seeing its zones of control dwindle even as it claims responsibility for bloody attacks abroad.
It once held most of Deir Az Zor province and its capital, encircling around 100,000 civilians that still lived in government-controlled neighbourhoods there.
But Russian-backed troops breached the ISIL sieges on the city earlier this month and are now working to shut off the group’s remaining escape routes.
Pro-regime forces had also begun fighting to reach the ISIL-held town of Albukamal, according to a statement published by a joint operations room of loyalists including Iranian, Iraqi, and Lebanese fighters from Hezbollah.
Albukamal lies on Syria’s eastern border with Iraq and is regularly targeted by coalition air raids.
ISIL has also been pushed out of two-thirds of its former bastion Raqqa by the SDF.