Syrian government forces have captured a key part of eastern Aleppo, splitting rebel-held territory in two, the BBC reports.
State TV said government troops were dismantling mines and explosives and continuing their advance.
A monitoring group says the rebels have now lost more than a third of the previously rebel-held areas of Aleppo.
Thousands of civilians have fled the besieged districts after a weekend of heavy fighting. Hundreds of families have been displaced within the area.
Both state TV and the UK-based monitoring group, the Syrian Observatory for Human Rights, said that the district of Sakhour had fallen to the Syrian army.
This cuts through the middle of the previously rebel-held territory, dividing it into two.