Yemen's Iran-aligned Houthi movement targeted a Saudi Aramco refinery in Riyadh using three drones, the group's military spokesman Yahya Sarea said in a televised address on Friday.
Sarea added that the movement also targeted Aramco facilities at the Saudi Arabian cities of Jizan and Abha.
A refinery in Saudi Arabia's capital, Riyadh, was attacked by a drone on Thursday morning but petroleum supplies were not affected, Saudi state news agency SPA reported early on Friday.