Syrian President Bashar Assad said in remarks published Monday that he was prepared "to negotiate everything" at planned talks later this month in Kazakhstan, seeking to cast himself as a peacemaker after his forces' recapture of Aleppo last month.
The Syrian government took full control of Aleppo on Thursday for the first time in four years after the last opposition fighters and civilians were bused out of war-ravaged eastern districts, sealing the end of the rebellion's most important stronghold.
Hundreds more Syrians left the rebels' last foothold in eastern Aleppo in convoys of buses escorted by the Syrian Red Crescent and the international Red Cross.
A cease-fire deal between rebels and the Syrian government in the city of Aleppo effectively collapsed on Wednesday, with fighter jets resuming deadly air raids over the opposition's densely crowded enclave in the east of the city.
UN Report: Pro-government forces in Aleppo killed at least 82 civilians, entering homes and executing people "on the spot." Others were killed as they fled.
Assad said that Syrian forces' victory in the battle for Aleppo will be a "big gain" for his government but that it will not end of the country's civil war.
With Syria's Russian-backed military appearing close to seizing total control of Aleppo, U.S. officials concede they have little to no chance of securing a diplomatic breakthrough to halt the 5½-year civil war in President Barack Obama's last weeks in office.
Russia announced a major air offensive in Syria on Tuesday as Syrian opposition activists reported the first airstrikes in three weeks in the besieged, rebel-held part of the northern city of Aleppo.