The mayor of Kyiv has confirmed "several explosions" have been heard in the Ukrainian capital this morning.
Witnesses claim black smoke was seen rising from a building in the city centre.
Meanwhile, Vladimir Putin's accused Ukraine of terrorism after an explosion on a bridge linking Russia to Crimea.
The Kremlin claims Kyiv's security services carried out the blast over the Kerch Strait.
Overnight shelling's destroyed more civilian buildings in the south-eastern city of Zaporizhzhia.
President Volodymyr Zelenskyy's called the attack "absolute evil".
"Official designation of Russia as a terrorist state is needed. Because he mentioned all levels.
"It is necessary to limit an economic contacts with any Russian subjects. You cannot be a sponsor of terrorism."