Russia has accused Donald Trump of falling victim to 'emotional overload' at a 'crucial moment' after the US President labelled Vladimir Putin 'absolutely crazy' for his brutal missile attacks on Ukraine.

When asked about Trump's explosive remarks, Kremlin spokesman Dmitry Peskov hit back but also thanked the President for helping to enable ceasefire talks.

'We are really grateful to the Americans and to President Trump personally for their assistance in organising and launching this negotiation process,' he said.

'Of course, at the same time, this is a very crucial moment, which is associated, of course, with the emotional overload of everyone absolutely and with emotional reactions,' he then added.

The reaction came following one of Moscow's biggest aerial attacks on Ukraine since the war began, with Russian forces bombarding civilian areas across the country, forcing NATO to scramble warplanes from Poland for the second night in a row.