Syrian army helicopters fired rockets and machineguns near central Aleppo on Tuesday as they battled rebels trying to enlarge their foothold in the country's second city, forcing residents to flee. Residents said fighter jets were flying over some rebel-held neighbourhoods, and that helicopters were firing at eastern and southern parts of the city located around only three kilometres east of Aleppo's ancient citadel in the city centre. Al Jazeera's Stefanie Dekker reports on the battle for Aleppo.