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 naval forces for years have been seizing weapons believed to be from Iran bound for Iran-backed fighters in Yemen, usually transported by fishing vessels.

US Central Command (CENTCOM), which is responsible for military operations in the Middle East, said about 1.1 million 7.62 mm rounds were sent to Ukraine.

They were originally seized by US naval forces in December 2022 and being transferred from Iran’s Islamic Revolutionary Guard Corps (IRGC) to the Houthi militia in Yemen.

“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,” the CENTCOM statement said.

The ammunition is unlikely to make a major difference on the battlefield at a time when long-range weapons and air defense systems are on top of Ukraine’s wish list.

The seized ammunition being transferred are also unlikely to ease concerns about the continued flow of western weapons to Kyiv.

Congress included no new money for Ukraine in the stopgap US spending bill it passed on Saturday to keep the federal government open, highlighting the increasing reluctance of some Republicans to provide funds for Kyiv.

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 militia has battled an Arab-led coalition since 2015.