Former US President Joe Biden said his successor Donald Trump's pressure on Ukraine to give up territory to Russia is a form of "modern-day appeasement" that will never satisfy Moscow.
Speaking to the BBC in what the broadcaster said was his first interview since leaving the White House, Biden said Russian President Vladimir Putin believes Ukraine is part of "mother Russia" and "anybody who thinks he's going to stop is just foolish".
Trump has changed US policy toward the war in Ukraine, pressing Kyiv to agree to a ceasefire while easing pressure on Russia, which launched a full-scale invasion of its neighbour in 2022. Trump has said he wants to stop the killing.
In the interview, Biden expressed concern that "Europe is going to lose confidence in the certainty of America and the leadership of America".
The former president said he was dismayed by the explosive meeting in February in the White House between Trump, his top officials and Ukrainian President Volodymyr Zelenskyy. "I found it sort of beneath America in the way that took place," Biden said.
The US Department of Homeland Security is sending "hundreds" more officers to Minnesota, Homeland Security Secretary Kristi Noem said, after tens of thousands of people marched through Minneapolis to protest the fatal shooting of a woman by an immigration agent.
The US military said on Saturday it carried out multiple strikes in Syria targeting ISIS as part of an operation that Washington launched in December after an attack on American personnel.
Israeli fire killed at least three Palestinians in two separate incidents across Gaza, local health authorities said, as tension rises over continued violence.
Tens of thousands of people marched through Minneapolis on Saturday to decry the fatal shooting of a woman by a US immigration agent, part of more than 1,000 rallies planned nationwide over the weekend against the federal government's deportation drive.
At least one person has died in Australia's southeast where bushfires raging for days have razed buildings, cut power to thousands of homes and burned swathes of bushland, police said on Sunday.