A television channel run by the country's Huthi rebels, who control Sanaa, reported more than 30 civilians killed in a raid by the Saudi-led military coalition that is allied with the Yemeni government.
The number could not be immediately confirmed with independent sources.
Witnesses told AFP multiple air strikes had hit the capital on Wednesday, including at a housing unit for workers from a nearby qat farm.
In June, 24 civilians were killed when an air strike hit a market in northern Yemen that was a centre for trafficking in qat, a leafy stimulant plant that is widely used in Yemen but banned by neighbouring Saudi Arabia.
Local sources, including hospital officials, blamed the June strike on the Saudi-led Arab coalition. The coalition has not claimed responsibility for the attack.
The war between the Saudi-backed government and the rebels, allied with Iran, has killed more than 8,300 Yemenis since 2015 and pushed the country to the brink of famine.
