In his nightly address
The Ukrainian President says the war in Ukraine began with Crimea and must end with its liberation.
Volodymyr Zelensky was speaking after a string of explosions hit a Russian airbase there, killing one person.
Russia's defence ministry said ammunition detonated at the base.
Separately, Ukrainian officials say 13 people were killed in overnight Russian strikes in the central Dnipropetrovsk region, and second in the Zaporizhzhia region in the south.