Israel killed the prime minister of the Houthi-controlled government in Yemen, Ahmed al-Rahawi, in an attack this past week that hit the capital, Sana, a Houthi spokesman said on Saturday. He was the most senior official in the Iranian-backed militant group to be killed in the conflict so far.

In a statement, the Houthi government said that a number of Mr. al-Rahawi’s colleagues were also killed and wounded, without naming them. It said Israel had attacked while they had gathered in Sana for a government workshop on Thursday afternoon.