Saudi Arabia’s state-run oil company said all of its oil, gas and refining plants are operating as normal, after Yemeni rebels said they hit facilities with a missile.

All installations in the kingdom are safe, Saudi Aramco said in a statement. A projectile fired from Yemen caused a fire at a power relay facility in southern Saudi Arabia, the state-run Saudi Press Agency reported, citing a spokesman for civil defense at the Ministry of Interior. The fire in Najran was put out without casualties, the report said, without giving further details.

Earlier, the Yemeni Saba news agency, controlled by Houthi rebels fighting Saudi Arabian-led forces in Yemen, cited “an unidentified military source” as saying a single missile was fired into Saudi Arabia. It caused extensive damage to facilities of the company, whose full name is Saudi Arabian Oil Co.

Most Saudi crude is produced in the the country’s east, about 1,200 km from the area where Saba said the missile landed. The Saba report was also carried by Iran’s Press TV. Saudi Arabia frequently says it intercepts missiles fired from Yemen.