Yemen’s Houthi rebels on Saturday said their prime minister had been killed in an Israeli air strike, the most senior official known to have died in a series of attacks during the Gaza war. Ahmed Ghaleb Nasser Al-Rahawi, who was appointed last year, was killed along with other officials in the Israeli attack on Thursday, the Iran-backed Houthis said. Israel has been striking Houthi targets for months in response to missile attacks by the rebels, who claim solidarity with the Palestinians and...