Saudi Arabia’s state oil company Aramco halted operations at its major Ras Tanura refinery on Monday following a drone strike, according to an industry source, as tensions escalated across the Gulf after U.S.-Israeli strikes on Iran.

The Ras Tanura complex, located on the kingdom’s Gulf coast, processes about 550,000 barrels of crude per day and serves as one of Saudi Arabia’s principal oil export terminals. The facility was shut as a precautionary step, and the situation was described as under control.

The development comes amid a broader wave of strikes across the region after Tehran launched retaliatory actions in response to the U.S.-Israeli attack on Iran. Incidents have been reported in several Gulf cities, including Abu Dhabi, Dubai, Doha, Manama and Oman’s commercial port area of Duqm.

The escalation has heightened concerns about the security of critical energy infrastructure and global oil supplies. Brent crude rose roughly 10 percent to around $80 per barrel as traders reacted to the rising geopolitical risk.

Saudi Arabia’s energy sector has previously faced similar threats. In September 2019, drone and missile attacks on the Abqaiq and Khurais facilities temporarily disrupted more than half of the kingdom’s oil production, sending global markets into turmoil.

The latest incident underscores renewed risks to energy facilities in the Gulf during periods of heightened regional instability.