Russia launched a massive attack on Ukraine overnight into Saturday with hundreds of drones, killing at least one person, part of a stepped-up bombing campaign that has dashed hopes for a breakthrough in efforts to end the more than 3-year-old war.

Under a scheme first trialled last year and dubbed "Army of Drones: Bonus" (also known as "e-points"), units can earn points for each Russian soldier killed or piece of equipment destroyed. And like a killstreak in Call of Duty, or a 1970s TV game show, points mean prizes.

Ukrainian President Volodymyr Zelenskiy said the attack on Odesa injured six people, including a child. Russia launched over 30 missiles and 300 drones during its overnight assault that affected 10 regions of the country, he added on Telegram, and reiterated the importance of air defence provision.