At least three children were among 27 people wounded as a result of a Russian drone attack on Ukraine's second-largest city of Kharkiv overnight that damaged apartments and a kindergarten, Ukrainian authorities said on Monday.

Russia’s surging defence industry, bolstered by an expanded missile plant in Votkinsk and rapidly expanding supply chains, could soon allow Russia to fire 1,000 missiles and drones at Ukrainian cities in a single night.

Ukraine said it struck a Russian air base on Saturday, while Russia continued to attack Ukraine with hundreds of drones overnight as 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.