Russia has repeatedly accused Ukraine of not honouring its obligations under the peace deal.
The Kremlin says Russian air strikes are targeting "well-known" terrorist organization inside Syria.
The blunt message marked another sign of European impatience with fighting that still engulfs Ukraine
Western powers are clinging to a fraying peace deal in Ukraine and forcing Kiev to follow suit .
A peace plan to end the conflict in eastern Ukraine came under renewed strain on Wednesday
The leaders of Germany, France, Russia and Ukraine have agreed a deal to end fighting in eastern Ukraine, participants at the...
Russian President Vladimir Putin held talks with top security chiefs on Thursday over a "deterioration of the situation" in eastern Ukraine...