Photo from Ukraine's Defense Ministry

"After 18:00 local time, Russian-backed militants started shelling the Ukrainian positions in the Mariupol and Donetsk sectors more actively," the ATO HQ said.

In particular, the enemy opened fire from a large-caliber machine gun on the outskirts of the town of Avdiyivka and the village of Mayorsk in the evening. What is more, Ukrainian strongholds near the village of Zhovanka and Butivka coal mine came under grenade fire.

Read alsoRussian experts on UAVs arrive in occupied Donbas Invaders used large-caliber machine guns to attack Ukrainian defenders of the villages of Vodiane and Talakivka in the Mariupol sector. "At 21:00 local time, they lobbed five 82mm shells into an area near the village of Lebedynske," the ATO HQ said.

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"Continuing cynically violating the peace agreements and showing a disregard for civilians in the region, the militants fired 82mm mortar shells at residential houses in the town of Maryinka. Fortunately, there were no victims among the locals," the ATO HQ said.

Ukrainian soldiers had to fire back 11 times. There is no loss among the Ukrainian defenders.