United States President Donald Trump has accused his Russian counterpart Vladimir Putin of talking "bullshit" about Ukraine, saying that the US would send the country more weapons to defend itself.
Trump's expletive reflected his growing frustration with the Kremlin leader over the grinding war that Russia launched more than three years ago.
"We get a lot of bullshit thrown at us by Putin, if you want to know the truth," Trump told reporters during a televised cabinet meeting at the White House on Wednesday AEST.
"He's very nice all the time, but it turns out to be meaningless."
Trump reiterated that he was "very unhappy" with Putin since their phone call last week made no progress on the Ukraine peace deal that the US president has pushed for since returning to power.
Asked about his interest in a bill proposed by the Senate for further sanctions on Russia, Trump said: "I'm looking at it very strongly."
Trump's criticism of Putin came a day after he said he would send more weapons to Ukraine, in a reversal of Washington's announcement last week that it was halting some arms shipments.
The US president, who alarmed Kyiv and western allies with his pivot towards Putin soon after returning to the White House, confirmed that decision on Tuesday.
"Putin is not treating human beings right. He's killing too many people. So we're sending some defensive weapons, and I've approved that," Trump said.
Trump has promised to immediately send 10 Patriot interceptors, anti-missile systems, to Ukraine, according to the US news website Axios.
He also urged Pentagon chief Pete Hegseth to push defence contractors to increase production of armaments.
"We have to step them up, Pete, and let them make it at a much higher rate," he said.
Russia says sending arms to Ukraine doesn't 'promote a peaceful resolution'
Russia had no immediate reaction to Trump's strongly worded comments about Putin, which come just two weeks after he also cursed while talking about the conflict between Israel and Iran.
But the Kremlin said that sending arms to Ukraine only serves to prolong the conflict.
"It is obvious, of course, that these actions probably do not align with attempts to promote a peaceful resolution," Kremlin spokesman Dmitry Peskov was quoted by Russian news agencies as saying in a briefing.
Any pause in weapons deliveries poses a serious challenge for Kyiv, which is contending with some of Russia's largest missile and drone attacks of the war.
Russia also launched a fresh large-scale drone and missile barrage on Monday including on Ukraine's military recruitment centres. Source: AAP / Ukrinform / Sipa USA
"We now have the necessary political statements and decisions, and they must be implemented as soon as possible to protect our people," he said.
Putin launched the full-scale invasion of Ukraine in 2022 and has shown little willingness to end the conflict despite pressure from Trump.
Russia said on Monday that its forces captured its first village in Ukraine's central Dnipropetrovsk region after advancing towards it for months.
The village of Dachne is in an important industrial mining territory that has come under mounting Russian air attacks.
Last month, Moscow said its forces had crossed the border into the Dnipropetrovsk region for the first time in its campaign.
Russia also launched a fresh large-scale drone and missile barrage on Monday including on Ukraine's military recruitment centres.
Kyiv said it carried out a drone attack on a Russian ammunition factory in the Moscow region.
Ukraine has so far denied any Russian foothold in Dnipropetrovsk.
