Around 1,600 buildings in Kyiv have remained without heat after a barrage of Russian attacks on energy infrastructure, officials said, as Ukraine's army claimed a strike on a key oil terminal in Russia.
Authorities in the Ukrainian capital say around 1,100 residential buildings and 500 other buildings were still without heat in Kyiv, in the midst of a gruelling winter of war.
Russia's recent attacks have triggered Ukraine's worst energy crisis of the nearly four-year-old war, leaving hundreds of thousands of homes without heat and electricity at a time when temperatures have dropped as low as -20C.
Deputy Prime Minister Oleksiy Kuleba said overnight that Russian strikes had also damaged railroad infrastructure in the southern region of Odesa and central-eastern region of Dnipropetrovsk.
Ukraine has also targeted Russian energy infrastructure with drone strikes, targeting the oil and gas industries helping to fund the invasion Moscow launched in February 2022.
The governor of the Russian border region of Bryansk said five municipalities and part of the regional capital had been left without heat and electricity by an "enemy attack".
Ukraine's army meanwhile said it had hit a key oil terminal in southern Russia near Moscow-annexed Crimea.
"An oil terminal in southern Russia and the Pantsir-S1 air defence system in the temporarily occupied territory of Crimea has been hit," Ukraine's General Staff said in a statement.
The attack was on the Tamanneftegaz oil terminal near the village of Volna in the Krasnodar region. Volna is home to the Black Sea port of Taman, used for Russian oil, coal and grain shipments.
Ukraine said the strike was part of "measures to reduce the offensive and economic potential of the Russian aggressor".
Krasnodar governor Veniamin Kondratyev had earlier said a Ukrainian attack had damaged an oil storage facility in Volna and wounded two people.
More than 100 firefighters had been deployed to extinguish "several fires", he added.
A house in Russia's Black Sea resort of Sochi -- largely spared from the attacks other southern cities have seen - was also damaged, Mr Kondratyev said.
'Europe not facing civilisational erasure,' says Kallas
Meanwhile, EU foreign policy chief Kaja Kallas has pushed back against Europe "bashing" by the United States, as she said Russia must be forced to make concessions in talks to end the Ukraine war.
"Contrary to what some may say, woke, decadent Europe is not facing civilisational erasure," Ms Kallas said on the last day of the Munich Security Conference.
"The message that we heard is that America and Europe are intertwined, have been in the past and will be in the future. I think this is important," Ms Kallas said.
"It is also clear that we don't see eye to eye on all the issues, and this will remain the case," she said.
The gathering in Munich has seen European officials insist the continent must take the lead on its defence in the face of an aggressive Russia and doubts over the reliability of the United States as President Donald Trump upends ties.
Watch: Rubio says US and Europe 'belong together' at Munich security forum
"There is an urgent need to reclaim European agency," Ms Kallas said.
She said European defence "starts in Ukraine" and depends on how Russia's war ends as the United States pushes efforts to stop the fighting.
"Let's be clear-eyed about Russia. Russia is no superpower," Kallas said, insisting the country was "broken".
"The greatest threat Russia presents right now is that it gains more at the negotiation table than it has achieved on the battlefield."
The EU top diplomat called for the size of Russia's military to be capped, said Russia must pay for damages caused, and be held accountable for war crimes.
France's Europe minister Benjamin Haddad backed up the calls for Europe to pay less attention to what the US says and focus on bolstering its own capabilities.
"I think the worst lesson we could draw from this weekend is to say, well, I can cling to some love words that I heard in part of his speech and push the snooze button," Mr Haddad said of Mr Rubio's address.
"Focus on what we can control, focus on our rearmament, on the support for Ukraine and the threat that Russia poses to all of our democracies," he added.
