Russia-Ukraine war: List of key events, day 617

Ukraine's Interior Minister Ihor Klymenko said 118 settlements in 10 regions of Ukraine's east had come under Russian fire in the previous 24 hours, marking the heaviest day of Russian shelling this year. Ukraine said the Kremenchuk oil refinery in central Ukraine caught fire after a Russian drone attack that knocked out the power supply in three villages while falling debris from downed drones damaged railway power lines in a nearby region. Officials said the fire was quickly extinguished. Ukraine's air force said air defences shot down 18 of 20 Russian drones and a missile before they reached their targets. Writing in The Economist newspaper, Ukraine's commander-in-chief General Valery Zaluzhny said the army needed new military capabilities and technological innovation – and air power, in particular – to break out of the current attritional fighting along the front line.