The decision is a setback for Ukraine as it tries to fend off escalating attacks from Russia, which has deployed 50,000 troops near the border with Ukraine's Sumy region. President Donald Trump said he is watching the situation closely amid fears of a new offensive.

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.

The US has halted weapons shipments to Ukraine because of concerns that America’s stockpile is too low. In a blow to Kyiv, the White House said it will “ put America’s interests first following a review of the nation’s military support and assistance to other countries across the globe” on Tuesday evening.