(CNN)Marathon peace talks aimed at ending the bloody crisis in eastern Ukraine concluded Thursday in a breakthrough: A ceasefire that's due to start Sunday and an agreement for both sides to pull back heavy weapons. If the ceasefire holds -- which is far from certain -- it could end a 10-month conflict that has claimed more than 5,000 lives, many of them civilians, and plunged East-West relations to their lowest point since the end of the Cold War. "We had just two options: bad, and worse. So we decided at this particular period of time to get the bad option. Probably this option will save the lives of Ukrainian soldiers, and I hope this option will save lives of Ukrainian civilians, of innocent people, who are under a constant shelling of Russian-led terrorists," Ukrainian Prime Minister  Arseniy Yatsenyuk said.
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"We had just two options: bad, and worse," the Ukrainian PM tells CNN
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A German government spokesman says the deal, reached after 17-hour talks, is a "reason for hope"
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The deal includes a ceasefire to begin Sunday and the withdrawal of heavy weapons
The ceasefire line for the @placeholder is the current front line and for the separatists it's the front line as it was at the time of the previous deal on September 19.