A Ukrainian military factory outside Kyiv has been partially destroyed by overnight Russian strikes, according to AFP reports. Moscow warns it will intensify attacks on the capital in response to Ukrainian strikes on Russian soil.
Russian officials accuse Ukraine of sending two helicopters across the border to bomb a town in Russia's southern Bryansk region, wounding eight people. Ukraine has denied the accusations.
The defence ministry in Moscow says that the number and scale of missile strikes against targets in Kyiv will increase in response to any terrorist attacks or sabotage committed by the Kyiv nationalist regime on Russian territory.
More than five million people have fled Ukraine since the Russian invasion on February 24, according to the United Nations.
The UN refugee agency lists 4,796, 245 million Ukrainians who have crossed the borders, while the International Organization for Migration says nearly 215,000 third-country nationals have also left.
Ukraine believes Russia will try to revenge after the sinking of its flagship, which Kyiv claims to have hit with Neptune missiles.
The cruiser strike of Moskva hit not only the ship itself, but it also hit the imperial ambitions of the enemy. Natalia Gumeniuk, a spokeswoman for Ukraine's southern military forces, said we are aware that we will not be forgiven for this.
Russia's military actions in Ukraine have sparked a dramatic U-turn in public and political opinion in non-aligned Finland and Sweden, which is considering joining the alliance.
Russia's defence ministry says it has killed 30 Polish mercenaries fighting for Ukraine in the northeastern region of Kharkiv.
It says strategic rocket forces eliminated up to 30 Polish mercenaries in a strike on the village of Izyumskoe near the city of Kharkiv.
The region's governor says that Russian strikes on the eastern Ukrainian city of Kharkiv killed seven people and left 34 wounded as Moscow's forces stepped up attacks.
The occupiers fired at a residential area in Kharkiv. 34 people were injured, including three children. One of the dead was a child, Oleg Synegubov says on social media.
The EU is working on a broadening of Russia's sanctions to include oil and gas embargoes but such measures will take several months, European officials tell AFP.
Russia's energy exports are Moscow's main hard currency earner and oil and gas sales to the EU account for between a quarter of a billion and a billion euro per day, per different estimates.
Moscow says 18 members of the EU mission in Russia have been declared persona non grata and must leave the country.
Russia's media watchdog Roskomnadzor blocks access to French radio station RFI for violating a law banning the dissemination of false or extremist information.
It does not say how the radio station has fallen foul of the law.