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 slowing of some weapons shipments promised to Kyiv by former President Joe Biden's administration came in recent days, they said, adding that air defense interceptors to help knock down Russian drones and projectiles are among the items delayed.

In an email, the Pentagon said it was providing President Donald Trump with options to continue military aid to Ukraine in line with the goal of ending Russia's war there.

"At the same time, the department is rigorously examining and adapting its approach to achieving this objective while also preserving US forces' readiness for administration defense priorities," said Elbridge Colby, the undersecretary for policy.

Ukrainian police officers seen in the frontline town of Pokrovsk in Donetsk, Ukraine, April 12, 2025
Ukrainian police officers seen in the frontline town of Pokrovsk in Donetsk, Ukraine, April 12, 2025 (credit: REUTERS/ANATOLII STEPANOV)

Russia advancing in Ukraine

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.

Ukraine called the acting US envoy to the foreign ministry on Wednesday and stressed the importance of continuing critical military aid to fight Russia's invasion, the ministry said, after Washington halted some deliveries of ammunition and missiles to Kyiv.

In a statement, it said Deputy Foreign Minister Mariana Betsa expressed gratitude to Deputy Chief of Mission John Ginkel for US support, but warned that a cut-off in aid, particularly air-defense systems, would embolden Russia.

"The Ukrainian side emphasized that any delay or procrastination in supporting Ukraine's defense capabilities will only encourage the aggressor to continue the war and terror, rather than seek peace," it said.

The Kremlin on Wednesday welcomed news that the United States has halted some weapons deliveries to Ukraine, saying that the fewer arms are shipped to Kyiv, the sooner the conflict will end.

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 matter told Reuters on Tuesday.

A senior Ukrainian lawmaker called Washington's decision "painful" for Kyiv's efforts to defend against Russian air strikes, which have intensified in recent weeks.

Politico reported the pause on Tuesday.