Riyadh says six injured in Iran-backed rebel attack, two soldiers killed in helicopter crash; Egyptian parliament postpones vote on aiding Saudi effort as Houthis issue threats

The Houthis have repeatedly attacked airports and oil infrastructure across the kingdom with drones and missiles that can change direction during flight, posing a challenge to interceptors.

At various times over the last decade, Saudi Arabia, the United Arab Emirates, the United States, Britain and Israel have carried out punishing air raids on the rebels — only to see them grow even stronger.