Pro-regime forces on Thursday (September 8th) overran a strategically important district on the southern outskirts of Syria's Aleppo city, rolling back nearly every opposition gain from a month-long offensive, AFP reported.

The regime advance in Ramussa further seals off Aleppo's opposition-held eastern districts, under renewed siege since Sunday by pro-regime forces.

Regime and regime-allied forces regained full control of the Ramussa district after "ferocious clashes" with opposition, Islamist and extremist fighters, the Syrian Observatory for Human Rights said.

Observatory head Rami Abdel Rahman said the capture came after reinforcements of Iraqi and Iranian pro-government militiamen arrived south of the city earlier this week.

Opposition forces launched an assault in Aleppo's southern outskirts on July 31st in a bid to break the regime's encirclement of the eastern neighbourhoods.

They successfully opened a route into those districts a week later via Ramussa, but regime forces have managed to recapture nearly all that territory.