"Putin-backed mercenaries were firing anti-aircraft guns, mortars, rocket-propelled grenade launchers, heavy machine guns and small arms in the direction of the towns of Maryinka, Krasnohorivka and Avdiyivka, as well as the villages of Troitske, Verkhniotoretske, and Pisky [near the ruined Donetsk airport]," the ATO press center wrote on Facebook on Tuesday.

There were 20 attacks in the Donetsk sector alone.

The terrorists also used mortars, rocket-propelled grenade launchers and small arms to directly shell the Ukrainian positions in the villages of Shyrokyne, Zaitseve and Novhorodske.

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From 20:00 to 21:00 local time on Monday, the militants were firing Grad multiple rocket launchers twice at civilian settlements near the towns of Krasnohorivka and Hirnyk.