Government forces capture largest rebel-held district of Aleppo as rebels admit to a collapsing frontline.
An official from Jabha Shamiya, one of the biggest groups fighting against Assad in northern Syria, told Reuters news agency: "The revolutionaries are fighting fiercely but the volume of bombardments and the intensity of the battles, the dead and the wounded, and the lack of hospitals, are all playing a role in the collapse of these frontlines."
Members of Jabha Shamiya have taken part in the fighting in Hanano.
He condemned the "international silence" and said the government and its allies were trying to exploit the period before the next US administration took over.
"The Iranians, Russians and regime know there is a vacuum and they are trying to exploit it using all means," he said.
"We are in touch with the friendly states but unfortunately Aleppo is being left to be slaughtered."