The Syrian government and armed opposition groups, together with both sides' backers, are close to agreeing on the composition of a constitutional committee in the coming months, said Russian negotiator. 

Diplomats from Russia, Iran, and Turkey will meet with United Nations negotiators in Geneva to discuss the issue again, he said, adding that the issue was at the finish line.

"The timing has not been agreed yet, taking into account the upcoming month of Ramadan, it is most likely to happen after that," Lavrentyev told reporters. "But I think by that time (UN mediator) Pedersen will be able to announce the establishment of the committee."

Forming a constitutional committee is key to political reforms and new elections meant to unify Syria and end an eight-year war that has killed hundreds of thousands and displaced about half of Syria's pre-war population of 22 million. (ILKHA)