Arab coalition forces have reportedly seized an Iranian ship in the Arabian Sea carrying weapon supplies for Yemen’s Houthi fighters, the Saudi-led group said Wednesday. The announcement came as the Arab alliance has seen gains against Iran-backed Houthi rebels in recent months, in an attempt to boost President Abd-Rabbu Mansour Hadi’s government.

“The Command of the Coalition… foiled an attempt to smuggle weapons destined to the Houthi militias, on an Iranian fishing boat,” the statement said, adding that the vessel was seized over the some 150 miles off the coast of southern Oman, according to Reuters.