The oil facilities are run by the state-owned company Aramco.

Footage showed a huge blaze at Abqaiq, site of Aramco's largest oil processing plant, while a second drone attack started fires in the Khurais oilfield, reported BBC.

Saudi state media said the fire has been brought under control.

The Security Spokesman at the Ministry of Interior said that at 4:00 am on Saturday, 15/1/1441 AH, the industrial security teams of Aramco Company controlled two fires in two factories belonging to the company in the City of Abqaiq and Khurais Village, targeted by drones, reported Saudi Press Agency.

Saudi authorities have started investigating the incident.

A spokesman for the Iran-aligned Houthi group in Yemen was quoted as saying by BBC that it had deployed 10 drones in the attacks.