UN Syria envoy still working on Aleppo ceasefire: deputy UN Syria envoy Staffan de Mistura has not abandoned a plan to freeze fighting in Aleppo city, despite a lack of progress on the proposal, his deputy said on Tuesday. During a joint presser, UNRWA head Pierre Krahenbuhl also discussed Yarmuk and the efforts done to provide response and assistance to people inside the besieged camp. IMAGES AND SOUNDBITES