Ukraine has accused Russia of striking a power plant in Kyiv after Donald Trump announced an 'energy ceasefire' between the warring countries.
In a surprise social media post, the US president announced the deal and said that 'both parties' had agreed to it, warning: 'Do not break it!'
Volodymyr Zelensky subsequently said the deal was 'news for me' - but added he would agree to it if Moscow did.
The Ukrainian president then accused Vladimir Putin of striking energy facilities within hours of the ceasefire's declaration.
He said in a post on X that he has briefed European Commission President Ursula von der Leyen on the 'brutal Russian strikes that continue unabated'.
'Just before our conversation, the Russians struck a power plant in Kyiv with a “shahed” drone, and many districts experienced power outages. Later, there were strikes on energy facilities in the Kharkiv region.
'And all of this happened AFTER the President of the United States made his statement about an energy ceasefire,' he said.
It comes as the Trump administration has been accused of threatening to stop the procurement system that provides Ukraine with weapons, in order to pressure Kyiv into halting its strikes on Russian infrastructure.
Emergency services personnel douse a fire after a reported Russian attack on an industrial facility, amid Russia's attack on Ukraine, in Bucha district, Kyiv region, Ukraine, October 11
Volodymyr Zelensky said the 'energy ceasefire' was 'news for me' - but added he would agree to it if Moscow did
Vladimir Putin has been accused of striking energy facilities within hours of Trump announcing an agreement had been brokered between the adversaries
The 'energy ceasefire' comes just days after Trump announced a deal to import nearly two million tonnes of Russian diesel over the next few months.
He is under pressure to reduce fuel prices as the US heads towards midterm elections next month, which are predicted to be a bloodbath for his Republican Party.
Moscow did not immediately comment on the 'energy ceasefire'.
Zelensky said that while his country 'welcomed' the announcement by Trump as 'good news for everyone,' Moscow was still hitting energy infrastructure in Kyiv and in the city of Kharkiv.
'Unfortunately, Ukrainian skies have been infested with Russian "shaheds" all day today,' he said in an evening address, referring to drones launched by Moscow.
'There have been glide bomb strikes and strikes on our energy infrastructure too. A power plant in Kharkiv was attacked this evening.'
The presidential office confirmed the Kharkiv attack came after Trump's ceasefire post.
Zelensky said Ukraine was 'ready to refrain from striking Russian energy infrastructure - and we count on the same readiness from Russia'.
Washington is currently lobbying European capitals and Kyiv in an attempt to end the attacks on Russian oil refineries, according to a report in the Financial Times.
The US message included threats to stop intelligence sharing and Purl - the Prioritised Ukraine Requirements List mechanism for procuring American weapons for Kyiv - officials told the newspaper.
'They are calling Kyiv... they are calling everyone [in Europe),' said one person who received a call from a US defence official.
Meanwhile, a bipartisan group of six senators on Sunday called for the Trump administration to 'immediately reverse course' on its plan to purchase diesel from Russia as part of an effort to lower high fuel prices.
Trump shocked lawmakers when he announced on social media Friday that he struck a deal with Putin in a phone call.
He said Russia will immediately supply more than 300,000 tonnes of diesel to the American and global market, followed by an additional 500,000 tonnes in November and 1 million tonnes 'immediately thereafter'.
Russia will deliver an additional 3 million tonnes 'within a short period of time' after that, he wrote.
Four Republican senators and two Democratic senators signed onto the statement released Sunday in protesting the deal.
They said the administration failed to consult with Congress or submit any explanation to justify its decision as required by statute.
'The United States should not provide Putin with a financial lifeline while Russia continues to kill Ukrainian civilians. The Administration must immediately reverse course,' they wrote.
The Republican senators who signed onto the statement are Sens. Susan Collins of Maine, Lisa Murkowski of Alaska, Thom Tillis of North Carolina and John Curtis of Utah. The Democratic senators are Sens. Jeanne Shaheen of New Hampshire and Richard Blumenthal of Connecticut.
Tillis, in an interview that aired Sunday on NBC's 'Meet the Press,' said there's a legitimate case for saying the president is not following the law if the administration goes through with its diesel purchase plan.
'We were very clear that Russia is the aggressor. Russia is the one who can end this war by backing out of territory that they occupied,' Tillis said.
Trump's announcement came just a few weeks after Congress passed legislation that directed Trump to impose substantial tariffs on the top importers of Russian oil or natural gas, with an exception for countries that import less than 15 per cent of Russia's natural gas exports and have taken significant steps to reduce those imports.
The congressional effort was aimed at cutting the flow of money Russia receives from oil and gas sales to finance its war against Ukraine.
The lawmakers also noted that Congress explicitly banned Russia energy imports in 2022 to prevent the United States from financing the war.
'Congress was clear: the U.S. should not import oil from Russia until it ends its aggression against Ukraine and ceases threats against our NATO Allies,' the six lawmakers wrote in their statement.
;President Trump's decision to allow Russian diesel imports to the US runs directly counter to that law.'
The announcement comes just days after Donald Trump announced a deal to import nearly two million tonnes of Russian diesel over the next few months
Russia has sought to deny Ukrainian civilians power, heat and running water during the war, hoping to wear down public resistance to Moscow's full-scale invasion.
Ukrainian officials describe the strategy as 'weaponising winter'.
Zelensky said Ukraine has proposed many de-escalatory steps but Putin 'had one answer to all of them - "nyet." We do hope that he will finally say something different to America, Ukraine, and the entire world'.
He said Kyiv is maintaining contact with the US, and he thanked Americans for their support.
He said on X that he had spoken about the development with Canadian Prime Minister Mark Carney, Finnish President Alexander Stubb and NATO Secretary-General Mark Rutte.
In an interview broadcast earlier Sunday, Zelensky said Kyiv was ready to stop striking Russian refineries if Moscow halted attacks on Ukraine's energy system, and he asked Trump to press the Kremlin to agree.
'We are asking President Trump, (to) give them (a) signal, not (to) attack energy infrastructure of Ukraine,' he told ABC's 'This Week'.
On September 14, Trump claimed on social media that both countries had agreed 'not to hit' each other's energy infrastructure but offered no details on that proposal either.
While Zelensky had said Ukraine was ready to comply if Russia did, nothing came of the proposal.
Trump said Saturday it was time for Ukraine to get a new president, suggesting Zelensky has not done enough to end the war and blaming him for high diesel prices in the US.
Zelensky said in response to Trump's comments that Ukraine could hold elections if Russia agreed to a 60-day ceasefire.
'Give us two months, 60 days off. Total ceasefire, 60 days, and we will organize elections,' he said, adding that Ukraine would be ready to accept whatever choice its people made.
'With all respect to President Trump, it's up to our society, up to our people to choose one or another leader,' he said.
Holding an election during the war would be unlawful and that Ukraine would need security guarantees to allow for safe voting, Zelensky added.
Ukraine has been under martial law since Putin launched the full-scale invasion in February 2022, and the Ukrainian Constitution bars elections while it remains in force.
Beyond the legal barrier, a nationwide vote would be vulnerable to Russian attacks, and organising one is widely seen as logistically impossible, with roughly a fifth of the country held by Russia, millions of Ukrainians displaced abroad and soldiers on the front line.
Zelensky's term formally expired in May 2024, but the constitution allows him to remain in office until a new president is sworn in.
The exchange came as Kyiv pressed its campaign against Russian infrastructure, with a drone attack on Sunday shutting down a data centre in the city of Vladimir, east of Moscow, run by technology giant Yandex.
It was the third strike on the company's facilities in four days.
Russia and Ukraine have been waging a long-range aerial war while their armies remain largely deadlocked on the front line.
Trump, who on Friday struck a deal with Putin to buy diesel from Moscow in an attempt to address high fuel prices ahead of US midterm elections, has been urging Zelensky for weeks to stop striking Russian energy infrastructure.
He has sought to blame record US diesel prices on Ukraine rather than the US-led war in Iran, which has driven up world energy prices.
Ukrainian and European officials reacted to the diesel deal with dismay, saying it will help pay for Russia's war effort.
Zelensky responded by describing the deal as a 'gift to Putin' that 'played into Russia's hands' and would extend the war.
The Ukrainian drone attack on the Yandex data centre in Vladimir caused outages across the company's services, leaving users in dozens of Russian cities and in Kazakhstan, Belarus and Armenia unable to order taxis or access banking services, according to Russian independent news outlet Astra.
'Operations at the data centre have been completely halted. There were no injuries,' said the Yandex Cloud Telegram channel, which updates service availability.
Moscow residents described disruption to everyday tasks.
Pavel Belyavskiy, a driver for Yandex Taxi, said it was unclear whether orders were coming through at all, and that he had to cancel several rides after waiting a long time because he could not reach the passenger.
'I'd press the "call" button to contact them, but nothing happens,' he said. 'There's nothing I can do, so I'm just forced to cancel.'
Igor Mann said he tried to check on an order on the Yandex Market shopping platform but the page was unavailable, and connecting through a virtual private network did not help.
'Nothing worked,' he said.
Another Muscovite, Eduard Malyavko, said the outages had a 'direct impact' and weren't just about 'convenience'.
He said they affected 'healthcare, and everything else'.
On Thursday, a drone attack took a Yandex data centre offline in the Ryazan region, southeast of Moscow.
The next day, Ukrainian drones hit the company's major data centre in the Kaluga region, southwest of Moscow, disabling part of the facility, Yandex said.
Yandex, often described as Russia's Google, runs the country's most popular search engine and a wide range of digital services, and is heavily involved in Russia's artificial intelligence development.
Elsewhere, search and rescue operations ended in the southern city of Zaporizhzhia after a Russian bombing on Saturday, according to Ivan Fedorov, former regional head and co-chair of the regional defense council.
Zelensky said 23 people were killed in the attack, including four children.
More than 30 people were wounded, with eight still hospitalised.
A man was killed and two women wounded in a Ukrainian drone strike on Russia's Bryansk border region.
UK Prime Minister Andy Burnham said Britain supports calls for a 'sustained energy ceasefire'.
'Russia has intensified its strikes on Ukrainian energy infrastructure over the weekend,' he wrote on X.
'This is an attack on Ukrainian civilians, plunging them into cold and darkness.
'The UK strongly supports President Trump's call today for a sustained energy ceasefire to start now.'