FEATURE | Russia sets out punitive terms at peace talks with Ukraine

A current US administration official said Trump and the White House were not notified before the attack. A former administration official said Ukraine, for operational security reasons, regularly does not disclose to Washington its plans for such actions.

A UK government official said the British Government also was not told ahead of time.

Zelenskiy said the operation, which involved drones concealed inside wooden sheds, had helped to restore partners' confidence that Ukraine is able to continue waging the war.

"Ukraine says that we are not going to surrender and are not going to give in to any ultimatums," he told an online news briefing.

"But we do not want to fight, we do not want to demonstrate our strength - we demonstrate it because the enemy does not want to stop."

(Writing by Mark Trevelyan and Andrew Osborn; Additional reporting by Lidia Kelly in Melbourne, Olena Harmash and Christian Lowe in Kyiv, Ezgi Erkoyun in Istanbul, Tuvan Gumrukcu in Ankara, Trevor Hunnicutt in Washington, Andrew MacAskill and Darya Korsunskaya in London, Guy Faulconbridge in Moscow and Maxim Rodionov in London Editing by Rod Nickel)