TEHRAN, Young Journalists Club(YJC)_ A spokesman for Saudi Arabia's interior ministry said in a statement that the attacks targeted two Aramco factories in Abqaiq and Khurais.
The statement did not identify the source of the attacks, but Yemen's Houthi movement later claimed responsibility in an announcement on Al Masirah TV.
The movement's military spokesman General Yahya Sare'e said 10 drones were deployed against the sites in Abqaiq and Khurais, and pledged to widen the range of attacks on Saudi Arabia.
"This was one of the largest operations which our forces have carried out deep inside Saudi Arabia. It came after careful intelligence and cooperation with honorable and free people inside Saudi Arabia," he said without elaboration.
Abqaiq, about 60 km (37 miles) southwest of Dhahran in Saudi Arabia's Eastern Province, contains the world's largest oil processing plant. Most Saudi oil exported from the Persian Gulf is processed there. Khurais, 250 km Dhahran, hosts a major Aramco oil field.
Yemeni forces regularly target positions inside Saudi Arabia in retaliation for the Saudi war, which began in March 2015 in an attempt to reinstall the country's Riyadh-allied former regime and crush the popular Houthi Ansarullah movement.
The Western-backed military aggression, coupled with a naval blockade, has killed tens of thousands of Yemenis, destroyed the country’s infrastructure and led to a massive humanitarian crisis.