Yemen’s rebel group Houthis on Tuesday claimed attacks targeting Saudi Arabia, including Riyadh’s airport and financial hub, further disrupting life in the region’s economic powerhouse. In the early hours of the morning, AFP journalists heard blasts, while residents received a mobile-phone alert urging them to shelter from an “aerial threat”. The Saudi-led coalition fighting the Houthis said it shot down a ballistic missile launched at the city by the group. The incident…