Russia unleashed a massive drone attack on the Ukrainian capital, hours after US President Donald Trump expressed frustration at failing to make any progress toward ending Moscow’s war on Ukraine during a call with his Russian counterpart Vladimir Putin.

Three people have been killed and 45 injured following an attack by Ukraine on a factory in the city of Izhevsk - more than 1,000km (620 miles) from the border - Russian authorities say.

Russia launched 537 drones and missiles into Ukraine overnight into Sunday morning, according to Ukraine's air force.