Fires broke out at two Saudi Aramco oil facilities after they were attacked by drones early Saturday, the kingdom’s interior ministry said.
"At 4:00 am (0100 GMT) Aramco industrial safety teams began dealing with fires at two of their facilities in Abqaiq and Khurais as a result of […] drones, "the ministry said in a statement issued by the official Saudi press agency.
"The two fires have been controlled."
The statement added that an investigation was initiated after the attack in the Eastern Province of the kingdom, but did not specify the source of the drones.
Last month, an attack claimed by Yemen's Houthi rebels caused a fire at the Shaybah natural gas liquefaction facility in Aramco, but the company reported no casualties.
In recent months, Houthi rebels have carried out a series of cross-border attacks of missiles and drones against Saudi air bases and other facilities in what they say is retaliation for an air war led by Saudi Arabia in areas controlled by the rebels from Yemen.
There was no immediate claim of responsibility from the rebels for Saturday's attacks.
Tensions in the Gulf have skyrocketed since May, and US President Donald Trump suspended air strikes against Iran in the last minute of June after he shot down a US drone.
The United States and Saudi Arabia have also blamed Iran for multiple attacks on oil tankers in the Gulf.
Pakistan condemns attack
Later in the day, Pakistan strongly condemned the drone attack at the two Saudi oil facilities.
"Such acts to sabotage and disrupt commercial activities that cause fear and terror cannot be tolerated," the Foreign Ministry said in a statement.
"Pakistan hopes that such attacks will not be repeated given the potential damage they can cause to the existing peaceful environment in the region.
"Pakistan reiterates its full support and solidarity with Brother Kingdom of Saudi Arabia (KSA) against any threat to its territorial security and integrity," he added.