Yemen’s Iran-backed Houthi terrorists say they launched a drone attack on Saudi Aramco’s massive Jazan refinery, marking the latest strike against critical Saudi energy infrastructure as the regional confrontation continues to widen.

Saudi Arabia’s Energy Ministry confirmed that a fire broke out at a facility connected to the refinery and was later extinguished by Aramco’s industrial security teams. No injuries were reported. Riyadh did not confirm what caused the blaze, while Houthi military spokesman Yahya Saree claimed the group targeted the refinery with a drone.

Saree said the attack was retaliation for what the Houthis described as Saudi drone incursions over the Houthi-controlled Yemeni provinces of Saada and Hajjah. The Jazan refinery, located near Yemen along Saudi Arabia’s Red Sea coast, can process roughly 400,000 barrels of crude oil per day and produces products including gasoline and ultra-low-sulfur diesel.

It is not the first time the strategically important facility has come under attack. Aramco shut the Jazan refinery in late July after a previous Houthi strike damaged its Integrated Gasification Combined Cycle complex and tank farm area. Aramco CEO Amin Nasser said recent attacks have caused some production interruptions, though he said they have not had a material operational or financial impact on the oil giant.

The latest attack comes amid Saudi warnings that Iran-backed forces could launch coordinated strikes against the kingdom from multiple directions. A senior Saudi official told Reuters that intelligence indicated the Houthis could attack from Yemen while Iran-backed militias strike from Iraq, potentially targeting energy facilities, airports and ports.

The growing threat has pushed Riyadh to strengthen its regional defenses. Saudi Arabia, Turkey and Pakistan recently signed a mutual-defense pact stipulating that an armed attack against one country would be considered an attack against all three. The Houthi strike now places that new security architecture under an immediate spotlight as Tehran’s proxy network continues targeting Saudi territory and vital Red Sea infrastructure.