Gunmen attack the offices of the US oil company ABB Lummus Global Inc. in the port of Yanbu, Saudi Arabia. Six Westerners and a Saudi are killed. All four gunmen are killed in a subsequent shootout. Al-Qaeda is blamed for the attack. [BBC, 12/6/2004] Three of the gunmen apparently worked at the company and used their entry passes to gain access for the attack. [BBC, 5/31/2004]