Is Trump losing patience with Putin? Will sanctions against Russian oil giants hurt Putin? How much of Europe's oil still comes from Russia? Russian overnight attack on Ukraine's Kyiv kills at least 3, wounds dozens At least three people have been killed and dozens wounded in an overnight Russian air attack on Kyiv, according to the mayor of the Ukrainian capital, as Russia's war on Ukraine approaches its four-year mark. Mayor Vitali Klitschko said on Sunday that "several" Russian drones were operating over the city, and warned people to "remain in shelters".

Ukraine's president has urged the European Union to back a plan to release billions of euros in frozen Russian cash to help fund the country's defence. As EU leaders met in Brussels, Volodymyr Zelensky said he hoped they would make a positive decision about using €140bn (£122bn) in Russian assets currently held in a Belgian clearing house. The controversial move would would be on top of sanctions the block has imposed on Russia - the latest on Thursday targeting the Kremlin's oil revenues. They followed US measures against Russia's oil industry earlier - the first time President Donald Trump has sanctioned Moscow as he grows frustrated over President Vladimir Putin's refusal to end the war. On Wednesday evening, the US president confirmed that a planned meeting with Putin in Budapest had been shelved indefinitely.

Dozens of political prisoners have been freed from Belarusian prisons as part of a deal between authoritarian leader Alexander Lukashenko and US President Donald Trump. Fifty-two prisoners have been released, including trade union leaders, journalists and activists, but more than 1,000 political prisoners remain in jail. In exchange, the US has said it will relieve some sanctions on Belarusian airline Belavia, allowing it to buy parts for its airlines. The prisoner release came on the eve of joint military exercises involving Belarus and close ally Russia, and after what neighbouring Poland called an unprecedented Russian drone incursion into its airspace. Poland is closing its borders with Belarus because of the Zapad-2025 drills, which last until Tuesday.

"This could be a truly equalizing breakthrough that is great for researchers and developers with limited resources, especially those from the Global South," says Hancheng Cao, an assistant professor in information systems at Emory University. DeepSeek's success is even more remarkable given the constraints facing Chinese AI companies in the form of increasing US export controls on cutting-edge chips. But early evidence shows that these measures are not working as intended. Rather than weakening China's AI capabilities, the sanctions appear to be driving startups like DeepSeek to innovate in ways that prioritize efficiency, resource-pooling, and collaboration. To create R1, DeepSeek had to rework its training process to reduce the strain on its GPUs, a variety released by Nvidia for the Chinese market that have their performance capped at half the speed of its top products, according to Zihan Wang, a former DeepSeek employee and current PhD student in computer science at Northwestern University.

Less than four months after the revelation of one of the biggest hacking events in history--Russia's massive breach of thousands of networks that's come to be known as the SolarWinds hack--the US has now sent the Kremlin a message in the form of a punishing package of diplomatic and economic measures. But even as the retribution for SolarWinds becomes clear, the question remains: What exactly is that message? By most any interpretation, it doesn't seem to be based on a rule that the United States has ever spelled out before. On Thursday, the Biden administration fulfilled its repeated promises of retaliation for both the SolarWinds hacking campaign and a broad array of other Russian misbehavior that includes the Kremlin's continuing disinformation operations and other interference in the 2020 election, the poisoning of Putin political adversary Aleksey Navalny, and even older Russian misdeeds including the NotPetya worm and the cyberattack on the 2018 Winter Olympics. The Treasury Department has leveled new sanctions at six cybersecurity companies with purported ties to Russian intelligence services, as well as four organizations associated with its disinformation operations.

Six months after the Trump administration dealt a crushing blow to Huawei Technologies Co.'s smartphone business, the Chinese telecommunications giant is turning to less glamorous alternatives that may eventually offset the decline of its biggest revenue contributor. Among its newest customers is a fish farm in eastern China that's twice the size of New York's Central Park. The farm is covered with tens of thousands of solar panels outfitted with Huawei's inverters to shield its fish from excessive sunlight while generating power. About 370 miles to the west in coal-rich Shanxi province, wireless sensors and cameras deep beneath the earth monitor oxygen levels and potential machine malfunctions in mine pit -- all supplied by the tech titan. And next month, a shiny new electric car featuring its lidar sensor will debut at China's largest auto show.

The twin criminal indictments against Huawei unveiled by US authorities on Monday are packed with emails and financial transactions allegedly showing how the Chinese technology giant carried out criminal conspiracies. But the finer points of the 23 charges are less important than the overall shot they deliver across China's bows. The US considers Huawei to be an arm of the Chinese state – and their devices to be potential spying equipment for Beijing. Charges that Huawei illegally violated US sanctions on Iran hold the most symbolic significance. They allowed Kirstjen Nielsen, the homeland security secretary, to stress the company's activities had been "detrimental to the security of the United States".