Saudi Aramco has shut down its 400,000-barrel-per-day Jazan refinery after a Houthi strike reportedly damaged part of the Saudi facility. The shutdown took place on July 27, according to a market note cited by Reuters.

The reported damage involved the refinery’s Integrated Gasification Combined Cycle complex as well as part of the storage infrastructure. Based on the available account, the strike was significant enough to force a halt in operations at one of the kingdom’s major refining sites.

The Jazan refinery is an important industrial asset for Saudi Aramco, so any disruption there is likely to draw close attention from oil traders and energy market watchers. A shutdown of this size can raise concerns about refining output, product flows and how quickly the site can return to normal activity.

So far, the available report does not indicate how long the Jazan refinery outage may last or what the full impact on supply will be. What is clear is that the Houthi attack has led to a major operational disruption at a key Saudi Aramco refinery.