Three Ukrainian servicemen were killed and 27 injured in clashes with militants and gunfire on their roadblocks in the army operation zone in the past 24 hours, the anti-terrorist operation press center said.

"Casualties have reached 615 over the entire period of the hostilities: 173 servicemen have died and 446 have been injured," the press center said in a report posted on Facebook on Thursday morning.

A Ural truck came under machinegun fire near the town of Muratove, Luhansk region, at around midnight, the report said. "The truck was ambushed. One serviceman was killed and three were injured," the press service reported.

It came under fire from an AGS-17 grenade launcher and automatic weapons at a roadblock in the Luhansk region after midnight. A militant was taken prisoner. The servicemen did not suffer any casualties.

The Ukrainian infantry engaged in a shootout with the militia near Siversk, Donetsk region, at about 1 a.m. Two mortar crews were destroyed. Two servicemen were wounded, and a tank was damaged, the press center said.

It confirmed that a BTR-80 infantry fighting vehicle was blown up near Chervona Zoria. Two servicemen died and six were wounded.

Mortar and automatic gunfire was opened on the town of Dovzhansky from the village of Biriukove on Wednesday night. "Seven servicemen were wounded. Two of them are in a serious condition. Four of the injured are border guards," the press center said.