At least 10 people, including two children, were killed and 10 injured in Kharkiv after Russia attacked Ukraine with ballistic missiles and drones overnight, officials said.
A countrywide air raid alert was issued at around 3am local time to warn people against incoming Russian projectiles.
Kharkiv oblast governor Oleh Syniehubov said fires were reported as a result of a ballistic missile attack, which killed four civilians and injured 10, including two children.
Explosions were first reported in Kyiv at around 1.30am local time, the Kyiv Independent reported, followed by more blasts at around 1.40am local time.
The attack came hours after Ukrainian president Volodymyr Zelensky said he had visited the eastern front on Friday.
Zelensky said he gave awards to soldiers defending positions near Druzhkivka and Kostiantynivka in the eastern Donetsk region where Russian forces were concentrated in preparation for a spring offensive.