The Ukrainian military positions in Donbas have been shelled 57 times in the past 24 hours, the military operation press center said.Forty-four shell attacks have been recorded in the Mariupol area, it said. Ukrainian military fortifications near Talakivka, Pavlopil, Hranitne, Krasnohorivka and Maryinka were shelled from large-caliber machineguns, grenade launchers and small arms, according to the statement. Vodiane, Lebedynske and Shyrokyne were attacked with barrel artillery.In the Luhansk area, ten instances of ceasefire violation have been recorded. The Ukrainian positions near Popasna and Orikhove were attacked with grenade launchers, machineguns and small arms; in Novozvanivka and Krymske.Three shell attacks were recorded in the Donetsk area. In particular, in Avdiyivka and Verkhniotoretsk.