Yemeni security officials say the Saudi-led coalition has targeted encampments of Shiite rebels and their allies in the country's capital, Sanaa, and that eight people were killed in the airstrikes.
The officials, speaking on condition of anonymity because they were not authorized to speak to journalists, say that warplanes hit at least eight other Yemeni provinces on Thursday.
In Sanaa, the airstrikes also hit several houses of military leaders loyal to former President Ali Abdullah Saleh, who is allied with the Houthis.
The rebel-held Ministry of Interior says the raids in Sanaa killed 8 people, without specifying whether they were civilians.
The coalition launched airstrikes March 26 in a bid to push back the Houthi advance. The rebels seized Sanaa last September and now control much of the country's north