Syrian government representatives have ruled out starting direct talks with the opposition delegation, as peace talks entered a third day in Geneva.
On Tuesday, opposition leaders said they were ready to meet face-to-face.
But chief government negotiator Bashar al-Jaafari rejected the idea after meeting UN’s envoy for the second time.
Meanwhile, Syria’s main Kurdish party – which has not been invited to Geneva – plans to declare a federal system of administration in the country’s north, according to a report by BBC News.
Officials from the Democratic Union Party, whose YPG militia controls a 250-mile stretch of contiguous territory along the Turkish border, said the system would include representation for all ethnic groups living there.