The latest move by the rebels could throw the troubled plan even further into doubt. It echoed language used by Moscow in the early days of the conflict that promoted fears
Russia was looking to annex swathes of mainland Ukraine after its seizure of the Crimea peninsula.
Ukraine and the West insist that Moscow has funneled troops and arms across the border to fan the flames of the war in Europe's backyard.
Moscow has denied the allegations despite
overwhelming evidence that it has been involved in the fighting and its explicit political support for the rebels.