After his call with Putin, Trump said he did not think the Russian leader wanted a ceasefire or an end to the three-year-old conflict.

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, buzz of drones and large explosions. Ukraine said Russia fired a record 539 drones and 11 missiles.

Russia hit Kyiv with its biggest aerial attacks of the war despite a call between President Trump and Russian President Vladimir Putin.