"Criminals from the pro-Russian gangs have again shelled our strongholds near Avdiyivka and the village of Luhanske in the Donetsk sector, using small arms and grenade launchers," the ATO HQ said in an update as of 06:00 local time on Thursday, May 5, 2016.

Read alsoDonbas war update: One Ukrainian soldier wounded in last day"In the Mariupol sector, the militants attacked ATO forces near the villages of Hranitne and Novotroyitske, using small arms and large-caliber machine-guns," it said.

More than half of the attacks happened when it was dark, it added.

Since the early hours of Thursday, there have been no violations of the truce along the entire line of contact in Donbas.