Riyadh Talks
The ceasefire can be extended by mutual agreement and is contingent upon acceptance by Russia.
The meetings aim to support a Syrian-owned comprehensive political process that aligns with the aspirations of the Syrian people.
Former Syrian VP Farouk Shara may head the Syrian National Dialogue Congress in Sochi, according to Asharq Al-Awsat on Tuesday.
Riad Hijab, head of the main Syrian opposition bloc, announced on Monday his resignation from the High Negotiations Committee, after a nearly two-year term.
