Yemeni Houthi rebels say they have conducted drone attacks on airports in the Saudi Arabian cities of Jeddah and Abha. Riyadh denies the attacks were successful, saying its air defences shot the drones down before they could reach their targets. The incident comes as the US State Department considers removing the Iran-backed Houthis from its list of terrorist groups in order to facilitate the delivery of foreign aid to the Yemeni people.