Ukrainian troops have suffered losses of three servicemen killed and 13 injured in the anti-terrorist operation (ATO) zone in Donbas in the past 24 hours.

"Three Ukrainian servicemen have been killed, 13 more have been injured in hostilities in the past 24 hours," Andriy Lysenko, Ukrainian presidential administration spokesman for the ATO issues, said at a briefing in Kyiv on Tuesday.

He said that in the late afternoon the most intensive hostilities happened in Avdiivka's industrial area and in the vicinity of Donetsk airport. He said that a civilian has been injured in Avdiivka and mortar fire near Nevelske lasted almost an hour.

Overall 33 shellings have been conducted in the Donetsk sector, including 20 from heavy armaments, in the past 24 hours, he said.

He said that the residential area of the city of Toretsk and its suburbs have been damaged in shelling from heavy armaments. "Private houses, gas supply system and non-residential building in an allotment association have been damaged. No civilians have been injured," he said.

The Ukrainian troops were forced to open the retaliatory fire along the entire frontline from Luhanske to Pisky, he said.

In the Mariupol sector the enemy continues to open strong mortar fires, he said. The positions of the Ukrainian troops in Krasnohorivka, Maryinka and a section of the frontline from Hnutove to Shyrokyne have been shelled more than 120 times in the past 24 hours, he said.