Moscow warned that it should effectively hold veto power over any action to assist Ukraine after a peace deal is reached, rendering planned Western security guarantees for Kyiv moot and delivering a setback to negotiations championed by President Trump.

Today we have a positive signal from America, from President Trump, from his team, that they will be participants in the security guarantees for Ukraine. And this opens up the

Ukraine and its European allies have been buoyed by Trump's promise during a summit on Monday of security guarantees for Kyiv, but many questions remain unanswered. Officials told Reuters that the Pentagon is carrying out planning exercises on the support Washington could offer beyond providing weapons.

Russia launched 614 air attack munitions into Ukraine overnight into Thursday, the air force in Kyiv reported, in what the country's Foreign Minister Andrii Sybiha called a "massive combined air strike" on targets around the country.