What to know

• Explosions at Riyadh’s main airport have left three Saudi nationals dead, including an airline pilot, Saudi authorities said, after Yemen’s Houthis claimed responsibility for a string of strikes targeting the facility. The escalating violence underscores how Y...S1
• The attacks on October 8 were the deadliest in Saudi Arabia since the kingdom and allied forces in neighbouring Yemen launched a major military offensive against Yemen's Iran-backed Houthi rebels last weekendS2