The US and Russia have agreed terms for a "cessation of hostilities" in Syria from February 27, in a move to stem the spiralling violence in a civil war into which several foreign powers have been drawn.
The ceasefire plan does not include Isis or al-Qaeda's Syria branch, Jabhat al-Nusra, and leaves open the option for other groups to be excluded if they are deemed "terrorist" organisations by the UN Security Council.
Moscow and Washington, who back rival sides in the conflict, called on other parties to declare their acceptance of the plan by midday, Damascus time, on Friday, February 26.
According to the peace deal, Moscow, which backs Bashar al-Assad, the Syrian president, and Washington, which backs the rebels fighting to oust him, would set up a communication hotline and, potentially, a "working group" to ensure the plan's implementation and the honouring by their sides of the ceasefire.
John Kerry, US secretary of state, called on all sides to accept the deal. "If implemented and adhered to, this cessation will not only lead to a decline in violence but also continue to expand the delivery of urgently needed humanitarian supplies to besieged areas and support a political transition to a government that is responsive to the desires of the Syrian people," he said.