Yemen's Houthi movement has announced that an Israeli airstrike on Sanaa killed its prime minister and several senior officials. The group has vowed to retaliate for the attack, though the slain prime minister, Ahmed Ghaleb Nasser al-Rahawi, was not seen as part of the core leadership. The Houthis have previously targeted Israel and ships in the Red Sea in support of Palestinians in Gaza. The situation adds to ongoing regional tensions and could prompt further escalation.