High Negotiations Committee (HNC) officials are expected meet Yalcin in the Turkish capital alongside groups that took part in January 23-24 talks in Astana, the sources said.
Russia, Turkey and Iran are acting as the guarantors of the latest ceasefire in Syria, which went into force in late December 2016. The establishment of the truce between the government and opposition groups was followed by intra-Syrian peace talks in the Kazakh capital of Astana on January 23-24. At the negotiations, Russia proposed a draft of Syrian constitution to help the Syrians begin the discussion on their own version of their basic law.
The next round of UN-mediated talks in Geneva was expected to take place on February 8. On January 27, Russian Foreign Minister Sergey Lavrov said that the United Nations had decided to postpone the negotiations until the end of February.