Donald Trump has said American troops will not be sent to Ukraine, but the US may provide air support as part of a peace deal with Russia.

A day after his extraordinary White House meeting with Ukrainian President Volodymyr Zelenskyy and the leaders of Kyiv’s European allies, the US president told Fox News “when it comes to security, [Europeans] are willing to put people on the ground. We’re willing to help them with things, especially, probably, by air”.

Ukraine war – follow the latest developments

Mr Trump did not elaborate, but White House press secretary Karoline Leavitt told reporters US air support was “an option and a possibility”.

She said the US president “has definitively stated US boots will not be on the ground in Ukraine, but we can certainly help in the coordination and perhaps provide other means of security guarantees to our European allies”.

Air support could take many forms, including missile defence systems or fighter jets enforcing a no-fly zone – and it’s not clear what role the US would play under any proposed peace deal.

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What security guarantees could work?

Zelenskyy-Putin summit

It comes as planning for a possible Zelenskyy-Putin summit get under way. Talks between the Ukrainian and Russian president are seen by Mr Trump as vital to ending the war.

Sky News understands a meeting could happen before the end of the month, with Geneva, Vienna, Rome, Budapest, and Doha among the venues being considered.

Geneva, Switzerland, is considered the best option, with Rome or the Vatican disliked by the Russians and Budapest, Hungary, not favoured by the Ukrainians.

European allies are understood to want security guarantees to be defined before the meeting.

A NATO-like treaty, guaranteeing Ukraine’s allies would come to its defence in case of any future Russian attack, is being worked on and could be completed by next week.

Like the US, Sky News understands Italy is opposed to putting boots on the ground in Ukraine.

But EU diplomats are confident this is the best chance yet to stop the war, and allies could return to Washington in early September to celebrate any deal being struck.

Read more on Sky News:
‘Don’t trust Russia,’ diplomat warns
Why peace may be further away, not closer
Five key takeaways from White House talks

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Sky’s Mark Stone takes you inside Zelenskyy-Trump 2.0

Trump still has doubts about Putin

Despite the renewed optimism about a peace deal following Monday’s White House summit, Mr Trump has admitted Vladimir Putin might not be sincere about wanting to end the war.

“We’re going to find out about President Putin in the next couple of weeks,” he told Fox News.

He’s previously threatened to put more sanctions on Russia if a peace deal isn’t reached, though previously set deadlines have been and gone.

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Russia launched its biggest air assault on Ukraine in more than a month on Monday night, sending 270 drones and 10 missiles, the Ukrainian air force said.

Ukraine’s European allies in the so-called Coalition of the Willing, an initiative spearheaded by Sir Keir Starmer and Emmanuel Macron, discussed additional sanctions to place on Russia on Tuesday.