At least 34 civilians, including nine children, have been killed in a Russian air raid on Euphrates River ferries near
Syria's Deir Az Zor city, according to a monitoring group.
Rami Abdel Rahman, head of the UK-based Syrian Observatory for Human Rights, said the air strikes on Sunday targeted "more than 40 ferries" that left al-Boulil town southwest of Deir Az Zor for the eastern shore of the Euphrates.
No immediate response from Russian authorities was available.
Deir Az Zor province borders Iraq and is a strategic prize for both SDF and the Syrian regime army.
Map of Syria locating Deir Az Zor