Yemen's Houthi group said on Saturday it had attacked oil facilities in Saudi Arabia's Shaybah with 10 drones.
"The air force carried out the biggest attack on the Saudi depth since the beginning of the aggression against Yemen," Yahya Sari, a spokesman for its forces, was quoted as saying by Al-Masirah TV.
He added: ten drones targeted a field and the Shaybah refinery of Aramco in the east of the Kingdom, pointing out that the Shaybah refinery and field includes the largest strategic stockpile in the Kingdom, and can accommodate more than one billion barrels, according to the announcement.
Al-Houthi vowed that the Saudi-UAE alliance would carry out "larger and wider operations if the aggression continues." He reiterated his call on all companies and civilians to "stay away from all vital sites and targets in the Kingdom, because they have become legitimate targets and can be struck at any time."
He said that the group's goals bank "widens day after day," stressing that "there is no option for the forces of aggression and the Saudi regime only to stop the war and lift the siege on the Yemeni people."
The Houthis recently stepped up attacks by drones on Saudi military and civilian sites, where the group spoke of a bank with 300 targets inside Saudi territory.
In May, the Houthis announced a similar attack on seven drones it said were aimed at Aramco, and Saudi Energy Minister Khalid al-Falih admitted at the time that a booby-trapped attack on two pipeline pumping stations carried oil from the Eastern Province's fields to the Yanbu port on the west coast.