D Dominion Energy Inc

An attack by unidentified gunmen caused a small fire on a gas pipeline in Saudi Arabia's oil-rich Eastern Province, an official at state-owned Saudi Aramco said Tuesday.

The pipeline has been repaired and the incident had no effect on oil and gas production, the person said, but it marks the first reported attack on energy infrastructure within the kingdom since 2006.

The world depends on Saudi oil, which accounts for about 10% of global supply and takes pride in the security of its energy facilities. Previous incidents, including the foiled attack on the vast Abqaiq oil-processing facility by al-Qaeda in 2006 and a cyber-security breach at Aramco in 2012, have raised concerns about energy security.

Write to Summer Said at summer.said@wsj.com and Sarah Kent at sarah.kent@wsj.com

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