The US Central Command claims more than 3,000 assault rifles, 578,000 rounds of ammunition and 23 anti-tank guided missiles were recovered in the January 15 operation in the Gulf of Oman.
The government said the assault, which left 10 soldiers dead and several wounded, was aimed at cutting off a key route to the blockaded city of Taiz and undermined peace efforts.
The coalition said it destroyed 36 military vehicles and killed more than 264 rebel fighters in the past 72 hours, the Saudi Press Agency reported.
Yemen's southern forces spokesman said that between 30 to 40 soldiers were killed and at least 60 wounded, adding the death toll may still rise as rescuers were still clearing the scene.
The government and Houthi rebel forces blamed each other for the Friday night bombing of the hall near Hudaida's airport.
Humanitarian agencies have complained of a deteriorating situation in Yemen's Houthi-controlled north, with aid workers facing arrest and intimidation, as well as obstruction and bureaucracy that hampered their work.
Unable to contain a cholera outbreak that has claimed 115 lives, authorities in Yemen's rebel-controlled capital city say the disease is out of control and are appealing for help.
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