Ukrainian and Russian negotiators met with US officials for critical talks on Moscow's all-out war against Ukraine as the Kremlin signaled no softening of hard-line territorial demands following a late-night meeting between Russian President Vladimir Putin and a White House delegation.

The UAE foreign ministry said that the talks were "part of ongoing efforts to promote dialogue and identify political solutions" to end the almost four-year-long war.

One person died and 23 were injured as trilateral discussions in Abu Dhabi were set to resume.

Hope were high but expectations low last night as envoys from Ukraine, Russia and the United States met together for the first time.

Ukraine's foreign minister Andrii Sybiha condemns Putin for ordering a missile strike during peace talks in Abu Dhabi, calling it barbaric.