The National Interest:
The missile strikes that badly damaged a key Saudi oil facility on Sept. 14, 2019 largely remain a mystery to the public.
Yemen’s Houthi rebels, who have been at war with a Saudi-Emirati coalition since 2015, claimed responsibility for the coordinated attacks on two Saudi Aramco facilities, but it’s unclear that the Houthis alone possess the capacity for long-range, precision-guided strikes.
It’s possible the attacks involved far-flying drones firing small, guided munitions. The Aramco sites are around 800 miles from the Saudi Arabia-Yemen border. Iran’s hard-line Revolutionary Guard Corps in the past has supplied the Houthis with weaponry including drones and components for ballistic missiles.