Houthi rebels have repeatedly struck Saudi Arabia since war broke out across West Asia earlier this year. More than 300 people were injured and at least 12 killed over the weekend as missiles struck the King Khalid International Airport in Riyadh — the deadliest attack in any Gulf Arab country since the start of the Iran war. Matters worsened on Tuesday night as the headquarters of oil giant Saudi Aramco suffered extensive fire damage. The Houthis have since vowed to ramp up their strikes against airports and oil facilities.