Two Ukrainian military servicemen have been killed and five others injured in the Anti-Terrorist Operation (ATO) zone over the past 24 hours, Ukrainian presidential spokesman for the military operation Andriy Lysenko said.

"Two soldiers have been killed and five others injured because of the military activities over the past 24 hours," Lysenko said at a news briefing in Kyiv on Saturday.

The two servicemen were killed in an armed clash with militiamen in the Mariupol sector at nighttime, Lysenko said. "Due to coordinated actions by Ukrainian armed forces servicemen from different service arms, the enemy sustained heavy losses in that battle, namely up to 30 fatalities. Unfortunately, two Ukrainian armed forces servicemen died in the clash with the occupiers," he said.

The militants also fired more than 80 mines upon government forces' positions in Starohnativka, Chermalyk, and Shyrokyne in the Mariupol sector, Lysenko said.

The situation in Maryinka was relatively stable on Friday, with only one act of provocation committed by the militants, he said.

In the Luhansk sector, the militants violated the ceasefire twice in the Popasna district by opening fire from Pervomaisk, he said.

In the Donetsk sector, Ukrainian government forces' positions were attacked along the entire line of contact stretching from Troyitske to Krasnohorivka, Lysenko said. In particular, the enemy fired mortars 13 times near Horlivka and Donetsk, he said.