The US State department says all sides must maintain a sense of urgency in order to ensure that a ceasefire in Syria can happen soon.
Speaking in Paris on Tuesday Secretary of State John Kerry has said that a break in the fighting could be just weeks away.
It would allow nations supporting Syria's various factions to concentrate more on combating the Islamic State.
State Department spokesman John Kirby said the Secretary was realistic about how much work it would take to acheive
IN:"In order for..."
OUT: "of Vienna"
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