The Saudi-led coalition battling Yemen’s Houthis accused the rebels on Wednesday of targeting Islam’s holy city Mecca, sparking outrage across the Muslim world and deepening the conflict roiling the region.Fresh fighting between the Iran-backed Houthis and Saudi-backed Yemeni government has dragged in Riyadh, with the Houthis declaring a maritime blockade on the kingdom and targeting its ships in the Red Sea.Last week’s lightning offensive saw the group seize control of the entirety of Yemen’s...