Donald Trump has said Vladimir Putin “very stongly” told him he “will have to respond” to Ukraine’s drone strikes on Russia’s airfields.

More than a hundred Ukrainian drones were deployed inside Russia over the weekend, destroying more than 40 warplanes in an attack Volodymyr Zelenskyy said “will undoubtedly be in history books”.

Posting on Truth Social on Wednesday, the US president said that he discussed the attack with Mr Putin during an hour and 15 minute long phone call.

“It was a good conversation, but not a conversation that will lead to immediate Peace,” he wrote after their first call since 19 May.

“President Putin did say, and very strongly, that he will have to respond to the recent attack on the airfields.”

Read our Q&A: Would Putin go nuclear after Ukraine’s daring attacks?

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Will Putin go nuclear?

The Russian president’s foreign affairs adviser added Mr Trump told Mr Putin that the US did not have advance notice of the operation.

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An aide to Mr Putin also told reporters that they vowed to stay in constant contact, with the Russian president telling Mr Trump that recent talks between Russian and Ukrainian officials in Istanbul were useful.

The US president added that he and Mr Putin also discussed “the fact that time is running out on Iran’s decision pertaining to nuclear weapons, which must be made quickly,” before accusing Tehran of “slow-walking their decision”.

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New Ukraine drone attack video analysed

Russia ‘giving the finger’ – Zelenskyy

Later, Mr Zelenskyy, in a social media post, called for more pressure on Russia to end the war, saying: “Many have spoken with Russia at various levels.

“But none of these talks have brought a reliable peace, or even stopped the war. Unfortunately, Putin feels impunity.”

The Ukrainian leader added that “with every new strike, with every delay of diplomacy, Russia is giving the finger to the entire world – to all those who still hesitate to increase pressure on it”.

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It comes after Russia’s foreign minister claimed that Mr Zelenskyy refused a proposal for a pause lasting two to three days to pick up the bodies of dead servicemen.

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Earlier this week, the Ukrainian president said the proposal was not “a real ceasefire”.

He added: “I think they’re idiots because a ceasefire is meant to prevent people from being killed.”