Fires broke out at two Saudi Aramco oil facilities after they were struck by drones early Saturday, the kingdom's interior ministry said. 'At 4.00 am (0100 GMT) the industrial security teams of Aramco started dealing with fires at two of its facilities in Abqaiq and Khurais as a result of drones,' the ministry said in a statement.
The two fires have been controlled. The statement added that an investigation had been launched after the attack in the kingdom's Eastern Province but did not specify the source of the drones.
Last month, an attack, claimed by Yemen's Huthi rebels, sparked a fire at Aramco's Shaybah natural gas liquefaction facility but no casualties were reported.
In recent months, the Huthi rebels have carried out a spate of missile and drone attacks targeting Saudi air bases and other facilities in what it says is retaliation for a Saudi-led air war on rebel-held areas of Yemen.
There was no immediate claim of responsibility from the rebels. Tensions in the Gulf have soared since May, with the US President, Mr. Donald Trump, calling off air strikes against Iran at the last minute in June after it downed a US drone. The United States and Saudi Arabia have also blamed Iran for multiple attacks on tankers in the Gulf.