The U.S. is halting some shipments of weapons to Ukraine amid concerns that its own stockpiles have declined too much, officials said Tuesday.

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.

The Pentagon has halted some shipments of air defense missiles and other precision munitions to Ukraine over concerns that U.S. stockpiles are too low, two people familiar with the decision said on Tuesday.