"In the Luhansk sector, the enemy did not adhere to the ceasefire at the Svitlodarska Duha bulge in the evening hours," the report reads.

"Militants employed 82mm mortars and heavy machine guns against the Ukrainian fortified positions near the village of Luhanske. The shelling lasted for about two hours. Moreover, Russian-backed mercenaries fired small arms on the defenders of the village of Stanytsia Luhanska," the report says.

Read also"Christmas truce": Militants shell ATO forces in two Donbas sectorsIn addition, an enemy UAV was seen over Luhanske in the afternoon as it was apparently spotting militant's mortar fire.