A drone crashed at the Samref oil refinery operated by Saudi Aramco in the port city of Yanbu, Saudi Arabia. The country’s defense ministry confirmed the incident on Wednesday, stating that the extent of damage is currently being assessed. The crash occurred as tensions in the Middle East intensified following a series of retaliatory attacks.

The incident came after Iran launched strikes on several oil refineries across the region in response to an Israeli attack on what is described as the world’s largest natural gas field located in Iran. The crash at the Saudi facility adds to the growing instability in the Gulf, where U.S. installations have also been targeted in recent days.

Authorities have not yet disclosed the cause of the drone crash or whether it was linked to the ongoing regional hostilities.