Russia-Ukraine war at a glance: what we know on day 415 of the invasion

The FBI has arrested a 21-year-old air national guardsman in Massachusetts suspected of being responsible for the leak of US classified defence documents that laid bare military secrets in Ukraine and upset Washingon’s relations with key allies. Jack Teixeira could be facing charges under the Espionage Act. Each charge under the act can carry an up to 10-year prison term, and prosecutors could treat each leaked document as a separate count in his indictment.

UN nuclear chief Rafael Grossi warned on Thursday that “we are living on borrowed time” following two recent landmine explosions near Ukraine’s Zaporizhzhia plant. The International Atomic Energy Agency (IAEA) has repeatedly expressed fears over the safety of the plant, which is Europe’s largest atomic power station.

Ukraine’s armed forces have said Russian troops are attempting to surround the embattled city of Bakhmut from the north and the south. “Every day in Bakhmut area, the enemy makes 40 to 50 offensive and assault attempts, launches more than 500 strikes using the entire range of available weapons,” said Brig Gen Oleksiy Hromov, deputy chief of the Ukrainian armed forces general staff’s main operational department.

Russia’s defence ministry claimed its troops had already surrounded Bakhmut, but Yevgeny Prigozhin, head of Russia’s Wagner mercenary group, said it was “too early” to say. Prigozhin, whose forces have spearheaded much of the fighting for the embattled city, was responding to a statement by the Russian defence ministry that said Moscow’s forces were “blocking” Ukrainian forces from getting in or out of Bakhmut.

Fragmentation of the global economy into rival trading blocs runs the risk of prompting a new cold war, the head of the International Monetary Fund has said. Kristalina Georgieva, the IMF’s managing director, said a combination of the Covid pandemic, the war in Ukraine and shortcomings with globalisation had led to a potentially dangerous splintering.

Serbia never sold weapons or ammunition to Ukraine or Russia, president Aleksandar Vučić has insisted, following a leaked secret Pentagon report that said Serbia had pledged to send arms to Kyiv or had sent them already. Vučić said he was “quite certain” that Serbian ammunition would appear “on one side or the other in the battlefield” in Ukraine, after having been exported to Turkey, Spain or the Czech Republic.

Russia’s prosecutor general said it had opened an investigation into a video showing Russian soldiers apparently beheading a Ukrainian prisoner of war lying on the ground. It comes a day after president Volodymyr Zelenskiy urged international leaders to act, saying the world could not ignore the “evil” footage, which circulated on Telegram, Twitter and other social media channels, causing revulsion among Ukrainians.

Norway will expel 15 Russian embassy officials who it said were intelligence officers operating under the cover of diplomatic positions.

Alexei Navalny, Russia’s most prominent opposition leader, is grappling with a mystery ailment in jail that could be some sort of slow-acting poison, and has lost 8kg in weight in just over two weeks, his spokesperson Kira Yarmysh has said. “We do not exclude that at this very time Alexei Navalny is being slowly poisoned, being killed slowly so that it attracts less attention,” Yarmysh said in a post on Twitter. “He is being held in a punishment cell with acute pain without medical help,” she said.

The European Union has added Russia’s Wagner group to its sanctions list for “actively participating in the Russian war of aggression against Ukraine”. The mercenary group had already been placed on another EU sanctions list in February for violating human rights and “destabilising” countries in Africa.

Ukraine’s state-owned gas company Naftogaz on Thursday said Russia has been ordered by an arbitration court in The Hague to pay $5bn (£4bn / €4.5bn) in compensation for unlawfully expropriating its assets in Crimea, which the Russian Federation claimed to annex in 2014.

All Ukrainian cities and Crimea must be part of Ukraine again and a real peace will come by restoring the country’s borders, foreign minister Dmitro Kuleba has said on Thursday. “There is no difference between...any Ukrainian city, they all must and will be Ukraine again,” he said, speaking via a video link at a Black Sea security conference in Bucharest.

The UK’s Ministry of Defence has awarded £650m to manufacturers working on its Tempest fighter jet, in the latest sign that the UK is pushing forward with the aim of producing the aircraft by 2035. The Tempest programme is seen as a key part of the UK’s plans for defence spending and Russia’s invasion of Ukraine has put pressure on the government to increaseits investment.

ExxonMobil handed its chief executive a 52% pay increase to $35.9m (£28.7m) for 2022 after the oil company reported its highest ever profits amid Russia’s invasion of Ukraine. Darren Woods’ salary rose by 10% to $1.9m last year while his bonus and share awards surged by 80% compared with the year before.