Saudi Aramco refineries were hit hard in a drone attack, claimed by Yemeni Houthis, crippling Saudi crude output for several days. In the wake of the attack, US military command for the Middle East suggested sending more air defence missile systems to Saudi Arabia after existing ones failed to foil the strike. Some 88 Patriot systems deployed in Saudi Arabia failed to repel attack on Saudi Aramco oil facilities, letting dozens of drones and guided missiles get through defences, a high-ranking source in the Russian Defence Ministry said. The source dismissed the excuse that the US Secretary of State gave to explain the Patriot fiasco, noting that in fact the American air defence system simply has low efficiency