(UN News Centre) – The United Nations Special Envoy for Syria today said the ceasefire following last Friday’s Russia-United States agreement is largely holding but that desperately-awaited humanitarian convoys are unable to move due to a delay in getting permits from the Syrian Government. “It is particularly regrettable because […] we are losing time,” Staffan de Mistura told a press briefing in Geneva. “These are days which we should have used for convoys to move with the permit to go because there is no fighting,” he stressed.