The Pentagon has halted some shipments of air defense missiles and other precision munitions to Ukraine over concerns that US stockpiles are too low, two people familiar with the decision said on Tuesday.
The Pentagon's slowing of some weapons shipments promised to Kyiv under former President Joe Biden's administration occurred in recent days, the people said.
The Pentagon did not immediately respond to a request for comment.
Among the weapons that are being delayed are air defense interceptors that would help knock down inbound Russian drones and missiles and other munitions, the people said.
Russia, which already controls about a fifth of Ukraine, continues to advance gradually, gaining ground in recent weeks in Ukraine's southeastern regions of Donetsk and Dnipropetrovsk, and ramping up air attacks nationwide.
All weapons aid was briefly paused in February with a second longer pause in March. The Trump administration resumed sending the last of the aid approved under Biden.
No new policy has been announced.
Politico reported the pause on Tuesday afternoon.