Russia said Ukraine shelled Russian military positions on Friday during a 36-hour ceasefire unilaterally declared by President Vladimir Putin, which Kyiv and its allies have dismissed as a sham.
The Russian defence ministry said that its positions had come under attack in the Luhansk, Donetsk and Zaporizhzhia regions, but that its troops were observing the ceasefire.
"Four mortar shells were fired at Russian positions by the Armed Forces of Ukraine in the direction of Lyman," it said.