. >> if mari ruvell --mariupol falls into russian hand, it could establish a land border. the counselors are trying to salvage a fragile peace deal. greg should there be an attack on mariupol, which some fear, it would obviously completely change the basis of the minsk peace agreement. and we would face a new situation. greg -- >> but even the best intentions in pairs mean nothing unless the come -- the parties are moving toward a cease-fire deal. but while speaking of the conflict parties let's go to ukraine to the capital where our course on and is standing by -- our correspondent is standing by. separatists are saying they would -- they are withdrawing heavy weapons from the frontline. what will it take for the ukrainians to do the same? >> well, the ukrainian government is deeply skeptical about the assertion of the separatist that they indeed started to withdraw their heavy weapons. the military spokesman said they will only start to withdraw the if the cease-fire last a full two days. we have not seen that yet. quite clearly, kiev is afraid that the separatists will