Donald Trump believes "progress" has been made in talks to end the war in Ukraine.
He told reporters he has spoken with his Russian counterpart - the first officially acknowledged conversation between Vladimir Putin and a US president in around three years - but wouldn't say when or how many times.
"Let's just say I've had it... and I expect to have many more conversations, we have to get that war ended," he said.
"I do believe we're making progress. We want to stop the Ukraine-Russia war."
Trump has promised to end the war, but hasn't ever set out in public how he would do so.
The Kremlin, however, disputed Trump's optimism.
Deputy foreign minister Mikhail Galuzin told the RIA state news agency: "It is important that words be backed up by practical steps that take into account Russia's legitimate interests, demonstrating a readiness to eradicate the root causes of the crisis and recognise the new realities."
"Concrete proposals of this nature have not yet been received," he added.
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