Footage shows major oil fire on outskirts of rebel-held capital, additional strikes within city; Iran-backed group calls for evacuation of Riyadh airport, Aramco facilities

Yemen's Iran-allied Houthis said Saudi Arabia was attacking the Yemeni capital Sanaa on Tuesday after a Saudi-led coalition warned civilians to stay away from an oil depot on the city's outskirts, part of a rapidly escalating war between the sides.

The kingdom has appeared helpless in the face of barrages of missiles and drones fired by the Houthi rebel group from neighboring Yemen.