Air strikes escalate despite Syria ceasefire

The UN envoy for Syria has insisted a ceasefire in the country is largely holding "with some exceptions", despite opposition activists reporting a mounting number of government air strikes.

Speaking in Geneva, Staffan de Mistura said he is concerned fighting north-west of Damascus that has cut off the capital's clean water supply would further escalate and derail proposed negotiations between the government and the opposition in Astana, Kazakhstan, later this month.