Photo from Ukraine's Defense Ministry

Russia-led forces mounted three attacks on the Ukrainian army's positions in Donbas, eastern Ukraine, on June 1.

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"There have been no Ukrainian army casualties. Information on the enemy's losses is being clarified," the press center of the Joint Forces Operation (JFO) said in an evening update on Saturday.

All attacks were reported in the Skhid (East) sector, the report said.

In particular, Russian-occupation forces fired at Ukrainian positions near the town of Avdiyivka, and the villages of Pavlopil and Verkhniotoretske.

"To hostile provocations, Joint Forces units gave an adequate response," the press center added.