Malcolm Chalmers, deputy director-general of the Royal United Services Institute military think tank, told CBS News in March that about 20% of Ukraine's military hardware is supplied by the U.S., with 25% provided by Europe and the rest of the world, and 55% produced in Ukraine.

The move "was made to put America’s interests first," a White House spokeswoman said, as U.S. munitions have been depleted in recent years.

Russia, which has been sending massive waves of drones and missiles against Ukraine, said the U.S. move would help end the war early.

Five people were injured, including a 7-year-old boy and a 9-year-old girl, in a Russian attack on the southern Ukraine port of Odesa overnight, Ukrainian authorities said on Thursday.

The plant also specialises in the production of Osa air defence systems and has developed drones, according to Ukrainian media. An Ukrainian official confirmed to BBC Ukraine that two long-range drones operated by the Security Service of Ukraine (SBU) struck the Kupol plant from a distance of around 1,