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

A pall of acrid smoke hung over Kyiv on Friday morning following a night of intensive Russian strikes - the hours of darkness once again punctuated by the staccato of air defence guns, buzz of drones and large explosions.

Russia launched 550 drones and missiles across Ukraine overnight in the largest aerial assaults since the war began. The capital Kyiv was the primary target.