A large plume of fire and smoke was seen rising in the vicinity of an Aramco facility in Riyadh on Saturday, according to a witness cited by Reuters.
There was no immediate confirmation from Saudi authorities about the fire. Aramco did not immediately respond to a request for comment.
The fire comes amid escalating hostilities between Saudi Arabia and Yemen's Iran-aligned Houthis, who have stepped up attacks on Saudi cities and energy infrastructure. There was no immediate claim of responsibility for Saturday's fire.
The Houthis said last week they had attacked Saudi Aramco facilities in Yanbu with missiles and drones. Saudi Arabia said at the time that it had intercepted six ballistic missiles fired by the Houthis towards Taif and the Yanbu area, but did not report damage to Aramco facilities.