The Syrian Army has made rapid advances in the last few days, after weeks of intense Russian and Syrian air strikes.
Hundreds of residents of rebel-held eastern Aleppo fled shifting front-lines after a rapid advance by the Syrian army and allied forces of Russia and Iran that rebels fear could split their most important stronghold in two.
Capturing all of Aleppo would be a major victory for Syrian President Bashar al-Assad after five and a half years of fighting that has killed hundreds of thousands of people and displaced 11 million others.