>> As the army advances in eastern Aleppo, there's no let up in the bombs raining from Syrian and Russian planes. Air strikes killing at least ten people, as they try to get out of the rebel held sector on Tuesday. Dozens more are wounded or missing, according to the Syrian Observatory for Human Rights.
Reuters Angus McDowall has been following events from neighboring Lebanon.>> As rebels retreated rapidly from the northern part of the eastern sector of Aleppo, the front lines in the city rapidly changed, and thousands of civilians crossed over. Fleeing from the intensified fighting, into the safer, government held, western parts of the city and into the enclave of Sheikh Maqsoud held by Kurdish forces.
>> The UN estimates 16,000 people have been displaced by the battle for eastern Aleppo over the last few days A major assault by government forces, an allied militia has driven rebels from a third of the territory they've held for years. Clashes rage on as opposition forces try to hold the more defensible frontline, they've pulled back too.
For them, this is one of the darkest hours of the five and a half year civil war.>> Aleppo is the last major urban stronghold held by the rebels. And it's also located near Turkey, which has been the most consistent regional supporter of the rebellion, since it began.
And who's border provides a ready supply of weapons and personnel for the insurgency.>> International concern grows about the fate of Aleppo's starved and destitute people. Moscow saying on Tuesday that they'll be better off under its ally Bashar al-Assad's forces. The dramatic breakthrough it says, a blessing not a curse.