President Assad has strengthened his position with likely fiercer battles to come despite the deadly siege of Aleppo.
"There is absolutely no justification whatsoever for the indiscriminate and savage brutality against civilians."
Those leaving Aleppo would head for Idlib province to the west of the city.
President Assad’s forces now control more than two-thirds of the city.
The Turkish leader issued a swipe at the U.N. and Russian-backed Syria.
Civilian volunteers say the lack of medical supplies and aid will leave many facing death.
The Syrian army and its allies see a risk that Islamic State will regroup in eastern Syria as it is forced from the Iraqi city of Mosul.
Ramzan Kadyrov is building a special forces training ground east of Grozny.
The U.S. military the coalition stopped the attacks against what it had believed to be ISIS after Russia informed it that Syrian military personnel may have been hit.
The U.N. has officially implicated the Syrian Air Force in chemical weapon attacks in Syria.
Syrian government forces have also been accused of using chemical weapons.
Bashar-al Assad says MPs were "disconnected from reality" when they called for a referendum.
The dissenting State Department officials have suggested that Obama consider modest military means to halt Syria's barrel-bomber-in-chief.
So far, the Syrian regime has largely avoided fighting ISIS, preferring instead a live-and-let-live strategy and, at times, even coordinating with it.
Reuters reported that the alleged hacker, Peter Romar, was being extradited to the United States on Monday.