Ukrainian army positions came under 15 attacks, including those by use of 120mm mortars, in Donbas on Thursday, the anti-terrorist operation (ATO) press center wrote on Facebook.

"An industrial zone in the southern outskirts of Avdiyivka remains a hot spot on the map of hostilities," the report said.

Ukrainian strongholds in that area came under attacks of small arms, grenade launchers and 82mm and 120mm mortars, it said.

According to the press center, a Ukrainian stronghold near Novotroitske in Mariupol sector came under fire of large-caliber machineguns, various types of grenade launchers and anti-aircraft guns.

Ukrainian servicemen stationed near Syze in Luhansk region were attacked by a mounted anti-tank grenade launcher.

Militant drones conducted another reconnaissance mission in Donetsk region on Thursday evening, the report said.

The truce was breached at least three times on Friday, the press center said. Ukrainian strongholds near Avdiyivka and Opytne were shelled by 82mm and 120mm mortars.