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.
As the Islamic State group closes in on Syria's Deir Ezzor, residents said they are terrified of falling victim to the mass killings for which the jihadists have become infamous.
Syrian government forces clashed with Islamic State group fighters for a fourth day on Tuesday in an eastern city where a jihadist assault has left more than 100 dead, a monitor said.