The White House cited Pentagon concerns that some American arms stockpiles were dwindling too low. Among the affected weapons were air defense systems, bombs, missiles and artillery rounds.

Ukrainian President Volodymyr Zelensky met US President Donald Trump at last month's Nato summit The US has halted some weapons shipments to Kyiv, the White House has said, as Russia's war against Ukraine has intensified.

President Donald Trump said he has his eyes on the 50,000 Russian troops deployed to the border near Sumy in Ukraine, where there are fears Moscow is ready to launch a new summer offensive in a war the American leader is trying to end.

Holding the Russians off has become a game of whack-a-mole for outnumbered Ukrainian troops, with Russia frequently opening new lines of attack.

Russian authorities said at least three people were killed as Ukraine claimed an attack on a military plant in the city of Izhevsk.

A video posted on social media and verified by the BBC showed an explosion on the roof of a factory building Three people have been killed and 45 injured following an attack by Ukraine on a factory in the city of Izhevsk - more than 1,