Syrian Army Forces, Allies Take Large Parts of Eastern Aleppo
Video showed a tank flying the Syrian flag moving freely in the area following the advances.
Two rebel officials said the insurgents, facing fierce bombardment and ground attacks, had withdrawn from the northern part of eastern Aleppo to a more defensible front line along a big highway after losses that threatened to split their enclave.
The Syrian Observatory for Human Rights said the northern portion of eastern Aleppo lost by the rebels amounted to more than a third of the territory they had held, calling it the biggest defeat for the opposition in Aleppo since 2012.
Thousands of residents were reported to have fled.
Part of the area lost by the rebels was taken over by a US-backed Kurdish militia from another part of Aleppo in what rebels described as an agreed handover, a rare example of cooperation between groups that have fought each other.