The US is halting some shipments of weapons to Ukraine amid concerns that its own stockpiles have declined too much, officials said Tuesday, a setback for the country as it tries to fend off escalating attacks from Russia.

Certain munitions were previously promised to Ukraine under the Biden administration to aid its defences during the more than three-year-old war. The pause reflects a new set of priorities under President Donald Trump and came after defence department officials scrutinised US stockpiles and raised concerns.

“This decision was made to put America’s interests first following a review of our nation’s military support and assistance to other countries across the globe,” White House spokesperson Anna Kelly said in a statement. “The strength of the United States Armed Forces remains unquestioned – just ask Iran.”