At least three car bombings have hit mosques in the Yemeni capital, Sanaa, causing dozens of casualties, residents and officials say.
One health official was quoted as saying that at least 23 people had died.
A building reportedly used as the headquarters of Houthi rebel officials was also hit.
In March, attacks by Islamic State (IS) on mosques in Sanaa used mainly by Houthis left more than 130 people dead.
BBC