The move blindsided the State Department, Ukraine, European allies and members of Congress, who demanded an explanation from the Pentagon.

The Defense Department held up a shipment of U.S. weapons for Ukraine this week over what officials said were concerns about its low stockpiles. But an analysis by senior military officers found that the aid package would not jeopardize the American military’s own ammunition supplies, according to three U.S. officials.

The move to halt the weapons shipment blindsided the State Department, members of Congress, officials in Kyiv and European allies, according to multiple sources with knowledge of the matter.

Critics of the decision included Republicans and Democrats who support aiding Ukraine’s fight against Russia. A leading House Democrat, Adam Smith of Washington, said it was disingenuous of the Pentagon to use military readiness to justify halting aid when the real reason appears to be simply to pursue an agenda of cutting off American aid to Ukraine.