More than 70 people were wounded in a wave of Houthi attacks Tuesday on Saudi Arabia, authorities said, a major escalation in the renewed conflict between an important US ally and the Iranian-backed rebels in Yemen. The attacks come after weeks of escalating clashes between the Houthis and Saudi-backed government forces in Yemen, which shattered a four-year truce in the country’s civil war. Fighting has raged on fronts including Yemen’s west coast, with government forces saying they have made...