The  has suspended delivery of all US military aid to Ukraine, blocking billions in crucial shipments, as the White House piles pressure on Kyiv to sue for peace with Vladimir Putin.

The decision affects deliveries of ammunition, vehicles and other equipment, including weapons agreed to when Joe Biden was president.

It comes after a dramatic blow-up in the White House on Friday during which Donald Trump, criticized for what he claimed was Ukraine leader's disrespect and ingratitude, told Volodymyr Zelenskyy he was "gambling with" a third world war. Zelenskyy was told to come back "when he is ready for peace".

Ukraine’s prime minister, Denys Shmyhal, said on Tuesday that Kyiv still had the means to supply its frontline forces but warned thousands of lives were at risk and vital US-provided air defence systems could be affected.

"The same is happening with the Ukraine Security Assistance Initiative (USAI), a military equipment procurement program under which thousands of US-made weapons were given to Ukraine before Russia invaded. There was no way to put that on hold," Shmyhal told a press conference. "We only have one plan – to win and to survive."

Moscow celebrated the decision, with the Kremlin spokesperson Dmitry Peskov saying the US had been "the main supplier of this war so far".

European and Nato allies were not informed in advance, a Polish foreign ministry spokesperson said.

"This is a very important decision, and the situation is very serious," Paweł Wroński told reporters. "This sentence may sound banal, but it has great political significance – it  was made without any information, or consultation, neither with Nato allies, nor with the Ramstein group," he said. The Ramstein group is an alliance of 57 countries that has coordinated aid to Ukraine during the war.

The European Commission’s president, Ursula von der Leyen, announced proposals on Tuesday to strengthen Europe’s defence industry and increase military capabilities by mobilising close to €800bn (£661bn). The EU is holding an emergency summit on Thursday.

The White House’s decision followed a meeting that included Hegseth and the vice-president, JD Vance, along with the secretary of state, Marco Rubio; the director of national intelligence, Tulsi Gabbard; and Trump’s Middle East envoy, Steve Witkoff.

Oleksandr Merezhko, the chair of Ukraine’s parliamentary foreign affairs committee, said Trump appeared to be pushing Ukraine towards capitulation. "To stop aid now means to help Putin," Merezhko told Reuters. "On the surface, this looks really bad. It looks like he is pushing us towards capitulation, meaning  Russia’s demands."

Razom for Ukraine, a Ukrainian advocacy group, said: "By abruptly halting military assistance to Ukraine, President Trump is hanging Ukrainians out to dry and giving Russia the green light to continue marching west. Razom for Ukraine urges the White House to immediately reverse course, resume military aid and pressure Putin to end his horrific invasion."

The US Congress has approved $175bn (£138bn) in total assistance for Ukraine since Russia’s invasion nearly three years ago, according to the nonpartisan Committee for a Responsible Federal Budget. In December, shortly before leaving office, Biden announced an additional $5.9bn in security and budget assistance.

US assistance to Ukraine includes military aid, budgetary assistance largely delivered through a World Bank trust fund, and other funds that had been delivered through the US Agency for International Development, which has been throttled by the Trump White House.

Weapons assistance from the US has been facilitated through two programmes: presidential drawdown authority (PDA), which allows the president to quickly transfer weapons and equipment from US stocks to foreign countries without the need for congressional approval; and the Ukraine Security Assistance Initiative (USAI), under which military equipment is procured from the defence industry.

In total, the US has pledged $31.7bn of weapons aid to Ukraine through PDA. The majority – well over $20bn, according to a Reuters analysis – has been shipped.

The announcement pertains mainly to aid that had been previously approved but not yet disbursed. Trump has not approved any new aid under his own presidential authority since taking office and a new congressional aid package appears unlikely, at least in the near term.

US Democrats said the aid pause was dangerous. Brendan Boyle, a congressman in Pennsylvania who is a co-chair of the congressional EU caucus, said it was "reckless, indefensible and a direct threat to our national security".

Earlier on Monday, Trump had expressed fresh outrage at Zelenskyy for saying the end of the war could be "very, very far away".

Trump posted a link to an  outlining Zelenskyy’s comments and said: "This is the worst statement that could have been made by Zelenskyy, and America will not put up with it for much longer!

"It is what I was saying, this guy doesn’t want there to be peace as long as he has America’s backing and, Europe, in the meeting they had with Zelenskyy, stated flatly that they cannot do the job without the US. Probably not a great statement to have been made in terms of a show of strength against Russia. What are they thinking?"

Later on Monday, Trump said Zelenskyy “won’t be around very long” unless he succumbed to pressure and made a deal on US terms.

The Trump administration was also reported to be  on Monday to restore ties with Russia and lift sanctions on the Kremlin.

The White House has asked the state and treasury departments to draft a list of sanctions that could be eased for US officials to discuss with Russian representatives in the coming days as part of the  on improving diplomatic and economic relations, Reuters reported, citing a US official and another person familiar with the matter.

In an interview recorded on Monday before the announcement of the suspension, Vance told Fox News’ Hannity that giving the US an economic interest in the future of Ukraine would serve as a security guarantee – a reference to the minerals deal about which Zelenskyy had been summoned to Washington.

“If you want real security guarantees, if you want to actually ensure that Vladimir Putin does not invade Ukraine again, the very best security guarantee is to give Americans economic upside in the future of Ukraine,” Vance said.

Reuters contributed to this report
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