The US will transfer thousands of seized Iranian weapons and rounds of ammunition to Ukraine, in a move that could help to alleviate some of the critical shortages facing the Ukrainian military as it awaits more money and equipment from the US and its allies, US officials said.

US Central Command has already transferred over one million rounds of seized Iranian ammunition to the Ukrainian armed forces, it announced on Wednesday. The transfer was conducted on Monday, CENTCOM said in a press release.

“The government obtained ownership of these munitions on July 20, 2023, through the Department of Justice’s civil forfeiture claims against Iran’s Islamic Revolutionary Guard Corps (IRGC),” the statement says.

The Justice Department announced in July that it was seeking the forfeiture of “over 9,000 rifles, 284 machine guns, approximately 194 rocket launchers, over 70 anti-tank guided missiles, and over 700,000 rounds of ammunition” seized from Iran by the US Navy.

“These munitions were originally seized by U.S. Central Command naval forces from the transiting stateless dhow MARWAN 1, Dec. 9, 2022. The munitions were being transferred from the IRGC to the Houthis in Yemen in violation of the United Nations Security Council Resolution 2216,” the statement says.

The Biden administration has for months been weighing how to legally send the seized weapons, which are stored in CENTCOM facilities across the Middle East, to the Ukrainians.

Over the past year, the US Navy has seized thousands of Iranian assault rifles and more than one million rounds of ammunition from vessels used by Iran to ship weapons to Yemen. The seizures, frequently carried out with regional partner forces, target small stateless vessels on routes historically used to smuggle weapons to the Houthis in Yemen.