Syrian rebels control only a small area of Aleppo that is full of civilians and under very fierce bombardment after pro-government forces took the al-Maadi district, a Turkey-based official with the Jabha Shamiya rebel group said on Sunday. Rebel groups in Aleppo had received no word about US-Russia talks to resolve the crisis in Aleppo, the official said, warning that it would end 'in a tragic way' without outside intervention and that they faced 'death or surrender'.