The US has sent Ukraine more than 1 million rounds of Iranian ammunition that had been seized last year, the US military said on Wednesday.

US Central Command, which is responsible for military operations in the Middle East, said about 1.1 million 7.62 mm rounds were sent to Ukraine. US naval forces for years have been seizing weapons bound for Iran-backed fighters in Yemen, usually transported by fishing vessels.

They were originally seized by US naval forces in December 2022 while being transferred from Iran's Revolutionary Guards to Houthi forces in Yemen “in violation of the United Nations Security Council Resolution 2216.”

“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 Central Command said in its statement.

"The US is committed to working with our allies and partners to counter the flow of Iranian lethal aid in the region by all lawful means including US and UN sanctions and through interdictions," it added.

“Iran’s support for armed groups threatens international and regional security, our forces, diplomatic personnel, and citizens in the region, as well as those of our partners. We will continue to do whatever we can to shed light on and stop Iran’s destabilizing activities.”

Last year, Britain's Royal Navy said one of its warships had seized Iranian weapons, including surface-to-air-missiles and engines for cruise missiles, from smugglers in international waters south of Iran.

Yemen's Houthi movement has battled a Saudi-led coalition since 2015 in a conflict that has killed hundreds of thousands and left 80% of the population dependent on aid.

(With reporting by Reuters)