The drone attack targeted Abha regional airport, which has repeatedly been hit by the Yemeni rebel group in recent weeks.
Saudi special forces in cooperation with their Yemeni counterparts "conducted a successful operation that resulted in the capture of the leader of the Daesh branch in Yemen," says coalition spokesman Turki al Maliki.
The move follows after negotiations between the World Food Program and Iran-backed Houthi rebels stalled on an agreement to introduce controls to prevent the diversion of food away from the needy.
Up to 60 percent of beneficiaries at seven centres in Sanaa "confirmed they had not received any assistance" and 33 percent of respondents in the rebels' northern stronghold of Saada received no food in April, says head of the UN food agency.
As part of the "phase one" of a ceasefire, the Houthi movement's unilateral withdrawal from the key ports began on Saturday, in the most significant advance yet for efforts to end the four-year-old war and relieve hunger.
Fresh fighting comes days after Yemeni government accused Houthi rebels of breaching ceasefire and refusing to withdraw from port city in line with December agreement.
Roman politician Marcus Tullius Cicero said: “Laws are silent in time of war.” Almost 2,000 years later, it is a phrase that serves to describe the behaviour of Saudi Arabia and its role in a civil war that has killed tens of thousands of people.
United Nations Security Council unanimously approves deployment of more observers in a mission to solidify a ceasefire between Houthi rebels and government forces in flashpoint port city.
Both sides in Yemen's devastating four-year war agreed to a series of confidence-building measures, including an exchange of thousands of prisoners.
Houthi rebels deny accusations of selling aid meant for civilians, saying the World Food Programme instead sent "rotten food" to the war-torn Arab country which "is not suitable for human consumption".
It is the first meeting of a UN-led truce monitoring team in the war-torn city after the warring sides agreed to a UN-brokered ceasefire in the key port city.
The key port city was reported to be calm early on Wednesday, a day after a UN-brokered ceasefire went into effect. The UN plans to bring the warring factions together by videolink to discuss a force withdrawal from the city.
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