Russian missiles have hit Ukraine’s biggest cities, leaving four dead and dozens hurt, after Vladimir Putin vowed to intensify attacks.
Kyiv Mayor Vitaliy Klitschko said at least one person died and 27 were wounded as several blocks of flats were hit as a result of the Russian strikes.
Two more deaths were reported in the broader Kyiv region.
There have been major aerial assaults by both sides in recent days.
Russia launched its biggest aerial bombardment of the war late last week, killing 39 people.
Ukrainian forces responded with an attack on the Russian border city of Belgorod on Saturday, which killed at least 25 people and injured more than 100.
Russia’s Vladimir Putin vowed that attack would not go unpunished and Ukraine’s President Volodymyr Zelensky said since Sunday alone, Moscow had fired 170 drones and dozens of missiles.
Poland said it had deployed four F-16 fighter jets to secure its airspace in light of Russia’s “long-range aviation activity”.
Last Friday Poland said an unidentified object, probably a Russian missile, had entered Polish airspace for several minutes before turning back towards Ukraine.
