Saturday’s attacks on key Saudi Arabia processing plants will test the world’s ability to handle a supply crisis as it faces the temporary loss of more than 5% of global supply from the world’s biggest crude exporter. The Iranian-backed Houthis group in Yemen claimed responsibility for attacks that shut two plants at the Abqaiq facility, the heart of the Saudi oil industry, which will cut the kingdom’s production by about 5.7 million barrels per day (bpd), more than half of the kingdom’s output, according to a statement from state-run Saudi Aramco. Crude prices could spike by several dollars per barrel when markets open Sunday night as a prolonged outage could prompt the United States and other countries to release crude from their strategic petroleum reserves to boost commercial stocks globally. The US Energy Department said on Saturday it is ready to release oil from its strategic reserve if needed. “Oil prices will jump on this attack, and if the disruption to Saudi production is prolonged, an SPR release … seems likely and sensible,” said Jason Bordoff, founding director of the Center on Global Energy Policy at Columbia University in New York. It is too early to know the extent of the damage to the processing plants and the Saudi supply chain that brings crude from oil fields to export facilities. The chief executive of Saudi Aramco, Amin Nasser, said in a statement that the company will have more information within 48 hours, as it works to bring back the lost output.