Arab coalition forces waging a military campaign against Houthi fighters in Yemen seized an Iranian boat loaded with weapons in the Arabian Sea on its way to deliver supplies to the group, the Saudi-led alliance said on Wednesday.

The announcement was made a day after tribal fighters backed by the coalition won control of a strategic dam in central Yemen from Houthi forces following weeks of fighting in the area east of the capital Sanaa.

The coalition, which also includes Bahrain, Qatar, Egypt and the United Arab Emirates, has been battling the Iranian-backed Houthis for more than six months, trying to shore up President Abd-Rabbu Mansour Hadi's government and contain what the Gulf Arab states see growing Tehran's influence in their backyard.

As part of the campaign, Saudi-led naval forces have imposed a near-blockade to prevent weapons supplies from reaching the Houthis, resulting in long delays and mandatory searches for shippers in the region.

A coalition statement said 14 Iranian sailors were detained on the boat, which was carrying 18 anti-armoured Concourse shells, 54 anti-tank shells, shell-battery kits, firing guidance systems, launchers and binoculars' batteries.

"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 the vessel was seized on Saturday some 150 miles off Salalah in southern Oman.

There was no immediate comment from Iran.

Reuters