Smoke is seen following a fire at Aramco facility in the eastern city of Abqaiq, Saudi Arabia, September 14, 2019. REUTERS/STRINGER

Smoke is seen following a fire at an Aramco factory in Abqaiq, Saudi Arabia, September 14, 2019 in this picture obtained from social media. VIDEOS OBTAINED BY REUTERS.

Smoke is seen following a fire at an Aramco factory in Abqaiq, Saudi Arabia, September 14, 2019. REUTERS/Stringer

Fires burn in the distance after a drone strike by Yemen's Iran-aligned Houthi group on Saudi company Aramco's oil processing facilities, in Buqayq, Saudi Arabia September 14, 2019 in this still image taken from a social media video obtained by REUTERS.

Smoke is seen following a fire at Aramco facility in the eastern city of Abqaiq, Saudi Arabia, September 14, 2019. REUTERS/Stringer

Smoke is seen following a fire at an Aramco factory in Abqaiq, Saudi Arabia, September 14, 2019 in this picture obtained from social media. VIDEOS OBTAINED BY REUTERS.

A production facility is seen at Saudi Aramco's Shaybah oilfield in the Empty Quarter, Saudi Arabia, May 22, 2018.

Smoke is seen following a fire at an Aramco factory in Abqaiq, Saudi Arabia, September 14, 2019. REUTERS/Stringer, Image used for illustrative purpose

Smoke is seen following a fire at Aramco facility in the eastern city of Abqaiq, Saudi Arabia, September 14, 2019. REUTERS/Stringer