As the war enters its 807th day, these are the main developments.

Fighting

• Ukrainian strikes have killed three people and caused a large fire at an oil storage depot in Luhansk, the region’s Russia-installed governor, Leonid Pasechnik, has said in a Telegram message. Eight people were hospitalised.

• Ukrainian President Volodymyr Zelenskyy has said he will quash a new major Russian ground assault in the northeastern Kharkiv region, as he acknowledged the latest “heavy battles along the entire front line”, and appealed to Western allies to deliver more military aid.

• Ukrainian reinforcements have headed to Kharkiv, launched artillery and drone counterstrikes in response to the latest Russian offensive, while the authorities told civilians to flee the heavy fighting.
• General Oleksandr Pavliuk, commander of the Ukrainian Ground Forces, has played down the significance of possibly losing the eastern town of Chasiv Yar, which is described as a gateway to other cities that Russia is targeting, like Kramatorsk and Sloviansk.
• Hundreds of people in Ukraine’s city of Vinnytsia have bid their final farewell to Nazary Gryntsevych, a member of the Azov Brigade who had become a national hero and symbol of bravery after fighting Russian forces despite the fall of Mariupol.

Diplomacy and politics

• White House National Security spokesperson John Kirby has said the United States expects Russia to intensify its new offensive and commit additional troops, with the aim of establishing a buffer zone along the Ukrainian border.
• “It is possible that Russia will make further advances in the coming weeks, but we do not anticipate any major breakthroughs,” Kirby said. “And over time, the influx of US assistance will enable Ukraine to withstand these attacks over the course of 2024.”
• The US has announced a new $400m military aid package – including armoured vehicles, surface-to-air missiles and rockets – for Ukraine amid the Russian assault in the northeast of the country. It is the third package for Ukraine in less than three weeks, following two in late April valued at a total of $7bn.
• Poland’s central bank governor,  Adam Glapinski, has warned that his country faces further economic risks if the war in Ukraine comes closer to its borders.
• Canadian Defence Minister Bill Blair has announced a $76m Canadian dollar ($56m) financial package that would allow Germany to ramp up its air defence aid for Ukraine.

• Former Russian President Dmitry Medvedev has declared that the aim of nuclear exercises planned by Russia is to work out the response to any attacks on Russian soil. Medvedev, who is now deputy chairman of Russia’s security council, warns the West that Russia could attack not only Ukraine in response to such attacks.