The strikes targeted the home of the tribal leader in Sanban yesterday, a region in Dhamar province 113 km southeast of the capital, Sanaa, the officials and witnesses said.
The officials spoke on condition of anonymity because they were not authorized to talk to the media. Witnesses declined to give their names for fear of reprisals.
There was no immediate coalition comment. The coalition last week denied that its airstrikes hit a wedding party Sept. 28, killing more than 130 people in the deadliest single event of Yemen's civil war.
With pressure increasing on the Houthis, the United Nations yesterday announced that the rebels had accepted a Security Council resolution calling for an end to the fighting. The UN special envoy was on his way to the region to see how Yemen's government would respond.
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The Houthis have long resisted calls to withdraw from all areas they have seized, which is a key part of the resolution the council approved in April shortly after the conflict began.
The fighting has killed more than 4,000 people, leaving the Arab world's poorest country in the grip of a humanitarian crisis and on the brink of famine.
The forces' advance on the Houthis' last outpost in Marib had been stalling for weeks.
Houthis said they repelled attacks amid coalition airstrikes, but Yemen's pro-government satellite TV broadcast footage of bodies and destroyed tanks and armored vehicles from inside Sirwah.
According to medical officials, 70 Houthis and more than 50 pro-government fighters were killed in three days of fighting over the town. Witnesses in the town said few Houthi pockets still remain in Sirwah.