REUTERS

"The situation was most escalated in the Donetsk sector," the ATO HQ wrote on Facebook on Thursday morning.

"The militants used different types of grenade launchers, heavy machine guns and small arms to attack our positions near the town of Avdiyivka four times," the ATO HQ said.

Read alsoUkraine reports 2 WIA's amid 27 enemy attacks in last day"One Ukrainian soldier was wounded at about 23:00 Kyiv time as a result of one of these attacks. He was rushed to the nearest military hospital. His condition is satisfactory now," it added.

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In some cases when there was a direct threat to the life of the Ukrainian military, ATO troops were forced to fire back, the ATO HQ said.