Update 3.40pm: There are hopes of possible ceasefires in the Syrian city of Aleppo.
The Russian defence ministry says it is willing to support a United Nations proposal for weekly 48-hour "humanitarian pauses".
Aleppo has been torn between rebel control and government forces for the past four years.
Earlier: The UN has said not one aid convoy has reached civilians trapped in the besieged Syrian city of Aleppo this month.
The humanitarian task force is being suspended until a 48 hour ceasefire can be agreed.
Meanwhile, the UN envoy for Syria has cut short a meeting of its humanitarian aid task force amid continued fighting that has prevented aid deliveries to besieged areas for at least a month.
Staffan de Mistura said he halted the weekly meeting after only eight minutes on Thursday, saying there was "no sense" in having one because of the delay in aid deliveries.
Mr De Mistura reiterated his call for a 48-hour pause in the fighting, notably in the northern city of Aleppo, to help allow for deliveries and asked for a "gesture of humanity from both sides".
The envoy said he plans to reconvene the humanitarian task force next week and believes the task force's co-chairs - Russia and the United States - still want a non-military solution to Syria's conflict.