Photo from UNIAN

"As a result of enemy shelling in the past day, seven servicemen of the Armed Forces of Ukraine were wounded," the ATO HQ said in an update as of 06:00 local time on May 21.

The situation in the ATO zone in eastern Ukraine remains tense, it said.

Read alsoUkraine reports 4 WIAs amid 55 enemy attacks in last day"Russian's hybrid military forces have resorted to all new armed provocations against the Armed Forces of Ukraine, using heavy artillery. There were 48 recorded facts of the use of the weapons by the militants," it said.

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Twelve attacks were recorded in the Mariupol sector, 22 attacks in the Donetsk sector, and 14 in the Luhansk sector.

The occupiers used, among other weapons, 82mm and 120mm mortars, and grenade launchers.