The head of Ukraine's southern Kherson region says that Russian attacks during the 30-hour Easter ceasefire unilaterally declared by President Vladimir Putin over the weekend killed three people in the region.

Russia and Ukraine blamed each other for breaking an Easter ceasefire announced by Vladimir Putin, with both sides accusing the other of carrying out attacks.

Russian forces ended a short-lived cease-fire by launching a wave of aerial attacks against cities across south-eastern and central Ukraine overnight, including the capital, Kyiv, Ukrainian authorities said.