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.

Russia pummeled Kyiv with the largest drone attack of the war, hours after President Donald Trump spoke to Russia's Vladimir Putin, officials said.

One person has been killed and 26 others were injured after a night of intensive Russian strikes on almost every district in Kyiv, officials say. A pall of acrid smoke hung over the Ukrainian capital on Friday morning following hours of nightfall punctuated by the staccato of air defence guns,