Russia's hybrid military forces on June 1 mounted three attacks on Ukrainian army positions in Donbas, eastern Ukraine, with one Ukrainian soldier reported as wounded in action.

"The Russian Federation's armed formations violated the ceasefire three times in the past day," the press center of Ukraine's Joint Forces Operation Headquarters said on Facebook in an update as of 07:00 Kyiv time on June 2. "As a result, one Ukrainian serviceman was wounded in enemy shelling."

Read alsoUkraine's JFO HQ reports enemy death toll in Donbas in May

Russian-led forces opened fire from grenade launchers of various types and used an UAV.

Under attack were Ukrainian positions near the town of Popasna and the village Hnutove.

The Joint Forces returned fire in response to each enemy attack. According to intelligence data, two members of Russia-led forces were wounded on June 1.

"Since Tuesday midnight, Russia-led forces have attacked Ukrainian positions near the village of Mayorsk, using hand-held anti-tank grenade launchers and rifles," the update said.

There have been no Ukrainian army casualties since Tuesday midnight.