Syrian regime allies Russia and Iran and rebel-backer Turkey on Thursday signed a memorandum on a Moscow-backed plan to create safe zones in Syria, AFP news agency reported.
An AFP reporter at peace talks in the Kazakh capital Astana saw the heads of the delegations - who represent the three countries sponsoring the negotiations - sign the document.
The move is being seen as a breakthrough although the opposition hasn't backed the initiative.
Yesterday, Russian President Vladimir Putin while meeting Turkish leader Recep Tayyip Erdogan had proposed that safe zones in Syria should become no-fly areas if fighting on the ground stops entirely.
"If there is a de-escalation zone, then planes will not fly there on condition that no military activity emanates from these zones," Putin had said at a press conference with Turkish leader Recep Tayyip Erdogan.
Russia was hoping to negotiate a memorandum with Turkey and Iran to establish four de-escalation zones in Syria, Russian negotiator Alexander Lavrentyev had said earlier.
"These are the zones where most intensive fighting is taking place between the government forces, Jabhat al Nusra and a moderate opposition," Lavrentyev told reporters this morning.
Turkey's president had said on Wednesday (May 3) that he believed his Russian counterpart would play a major role in establishing a ceasefire in Syria.