Ukraine's President Volodymyr Zelenskiy said on Wednesday that his country stood by its offer to observe a 30-day ceasefire in its war with Russia, while the Kremlin had made no response to the proposal.

A three-day ceasefire declared by Russia came into effect on Thursday morning with skies over Ukraine's major cities quiet, in a change from successive nights of heavy attacks by Russian drones and ballistic missiles.

The unilateral ceasefire coincides with the celebrations in Moscow for the 80th anniversary of victory over Nazi Germany in World War II, Russia’s biggest secular holiday. Kyiv has pressed for a longer-term cease-fire.