In a rare rebuke, Trump said: "What the hell happened to him? He's killing a lot of people." He later called Putin "absolutely crazy". Kremlin spokesman Dmitry Peskov said this was a "very important moment which is connected to an emotional overload of everyone involved" but added Putin was taking decisions "necessary for the security" of Russia.

Between Sunday evening and Monday morning, Russia launched 355 drones and nine cruise missiles against Ukraine, according to Kyiv's air force. It was the largest drone attack on Ukraine since Russia's full-scale invasion started in February 2022, the Ukrainian air force said.  Ukrainian President Volodymyr Zelensky said "only a sense of total impunity" could allow Russia to "carry out such strikes and continue increasing their scale".

Earlier, Kyiv said Washington's "silence" over recent Russian attacks is encouraging Putin and urged "strong pressure", including tougher sanctions, on Moscow. Sirens warning of incoming drones and missiles sounded again in many regions of Ukraine early on Monday. Several people across the country are known to have been injured, according to regional authorities. Peskov said the latest massive aerial assaults were a response to Ukrainian attacks on what he called Russia's "social infrastructure".  The Russian Defense Ministry said on Monday morning that air defence systems destroyed 20 Ukrainian drones over several Russian regions. At least 12 people were killed and dozens injured in Ukraine overnight Sunday after Russia fired 367 drones and missiles in what was the largest aerial attack since the start of the war. (BBC)