The package being sent includes about $700 million for tank ammunition, $500 million in tactical vehicles and $60 million in mortar rounds, sources said.
The shipment was supposed to consist of thousands of 2,000- and 500-pound bombs, with U.S. concern being how the larger explosives could be used in Rafah.
Gen. CQ Brown said military leaders are working closely with Israeli forces to ensure U.S. troops are kept safe during their humanitarian mission in Gaza.
Congress has passed an $825 billion FY24 defense spending bill, but the plan to get Ukraine military assistance across the finish line remains uncertain.