Saudi Arabia’s oil refinery is attacked on September 14, 2019. (Photo: Twitter)

In a tweet, Mr. Trump wrote there is reason to believe that the US knows the culprit, but are waiting to hear from the Kingdom as to who they believe was the cause of this attack, and under what terms they would proceed. Mr. Trump also said he had also authorized the use of the US emergency oil stockpile to ensure stable supplies after the attack, which shut 5% of world production.

Oil prices surged more than 15% at the open on Sunday on worries over global supply and soaring tensions in the Middle East.