No Ukrainian soldiers were killed on Friday / Photo from Ukraine's Defense MInistry

Four Ukrainian soldiers were wounded in the Anti-Terrorist Operation (ATO) zone on Friday, presidential administration speaker for ATO issues Andriy Lysenko said at a briefing in Kyiv on Saturday, an UNIAN correspondent reported.

"Despite the intensity of firing on our positions in the past day, no Ukrainian soldiers were killed, whereas four were wounded," Lysenko said.

Two of them were injured in a skirmish near the town of Krasnohorivka, press officer of the B Sector of the ATO's headquarters Yevhen Silkin told Channel 5.

Russian-backed militants had been firing on Ukrainian positions for three hours. The firing stopped only at about one o'clock at night. After that there was a long pause in shelling. The Ukrainian troops deployed near the villages of Kamyanka, Opytne and Pisky [the latter is near the destroyed Donetsk airport] were also under enemy mortar fire.

"The village of Kamyanka was twice shelled from 82mm-caliber mortars in the direction of Yasynuvata in the past two hours alone. The shelling was long and intensive. Simultaneously, the Ukrainian positions near the town of Krasnohorivka were being shelled in the direction of Staromykhailivka. Automatic tank grenade launchers, heavy machine guns and anti-aircraft systems were used. At 2200 Kyiv time on Friday, this town was attacked from 120mm-caliber mortars. The shelling lasted for three hours. What is more, militants repeatedly used 120mm-caliber mortars to fire on Ukrainian troops near the villages of Opytne and Pisky last night. Two Ukrainian soldiers were wounded, with limb and body injuries," he said.

Besides, there was new firing on Saturday morning, the ATO headquarters reported.

"At 0400 Kyiv time today, the criminals were intensively firing on the positions of the 93rd mechanized brigade around Pisky in the direction of the village of Zhabyache from automatic grenade launchers during 20 minutes," Silkin said.