Syria has accused the US-led coalition of “war crimes” after air raids in oil-rich Deir Az Zor province targeted its fighters.
A US official told Reuters news agency on Thursday that more than 100 pro-government fighters were killed in the overnight raids.
The US said they had responded to an “unprovoked attack” against the Washington-backed Syrian Democratic Forces (SDF), but did not give any details on casualties.
A Pentagon spokesperson told reporters that the SDF had “acted in self-defence with support” from the US-led coalition.
“Pro-regime forces initiated what appeared to be a coordinated attack on Syrian Democratic Forces east of the Euphrates river deconfliction line,” Dana White said.