An air strike on one of the last holdouts of the Islamic State group in Syria has killed 54 people, more than half of them civilians, a war monitor said on Friday.
A powerful Syrian Kurdish militia announced on Sunday it had cleared Islamic State group fighters from key territory east of the winding Euphrates River.
At least 75 civilians were killed in an Islamic State group car bombing that struck a gathering of people displaced by fighting in eastern Syria, a monitor said on Sunday.
A Russian air strike killed at least 20 civilians on Wednesday as they tried to cross the Euphrates river to escape fighting in eastern Syria's Deir Ezzor province, a monitor said.
US-backed Syrian forces on Saturday captured the war-torn country's largest gas field from the Islamic State extremist militia organization, a monitoring group and Kurdish fighters said.
US-backed fighters made a sweeping advance against jihadists on Sunday in Syria's eastern Deir Ezzor province, capturing territory just kilometres from the provincial capital, a monitor said.
Russia claimed on Friday to have killed several top commanders of the Islamic State group in an airstrike in Syria, including the so-called Emir of Deir Ezzor and the "Minister of War".
Syrian government troops advanced overnight against the Islamic State group in the country's north and centre, drawing closer to the key battleground of Deir Ezzor, a monitor said.