"The next few hours, few days maximum, are crucial for making it or breaking it, and I want to believe that both Moscow and Washington are working on it seriously, because the alternative is back to conflict and war," de Mistura said following an unsuccessful Thursday meeting of the International Syria Support Group in New York.
"The good news, if you want to hear [it], is both Russia and America agreed to continue intensely to work on a possible restoration of it," de Mistura said.
De Mistura noted that the ISSG meeting failed to make progress on reinstating the Syria ceasefire because the two sides were unable to meet their prior, September 9 commitment to address the "ambiguity of al-Nusra and the issue about grounding the Syrian Air Force."
