Gunmen attack oil company compounds in Khobar, Saudi Arabia, and then take hostages. The Khobar headquarters of APICORP (Arab Petroleum Investments Corporation) is attacked and six people are killed. About 30 minutes later, gunmen storm the Petroleum Center headquarters about two miles away and kill at least four people. Then the gunmen move less than a mile away to the Oasis compound, a residential building full of Westerners, and take hostages. After a 24-hour siege, all but one of attackers manage to escape even though the building is surrounded by a cordon of hundreds of police. At least 30 people are killed in total, including nine hostages. Al-Qaeda reportedly takes credit for the attacks. [CNN, 5/30/2004; BBC, 12/6/2004] There is widespread speculation that the gunmen were allowed to walk free as part of a deal to ensure the safe release of other hostages. The BBC reports that counterterrorism experts say “they were surprised at the ease with which three of the four attackers were able to escape… despite the overwhelming numerical superiority of the security forces and the tactical and logistical advantages which they enjoyed. If true, the existence of collusion between attackers and the people meant to catch them would be most disturbing.” [BBC, 5/31/2004] The Scotsman adds, “Eyewitnesses said they were highly skeptical of official accounts that there were only four kidnappers, insisting others were seen during the earlier attacks on two oil industry office buildings and entering the sprawling compound. It was also reported that they arrived in three vehicles.” Further, the fact that “the Khobar attackers wore military uniforms has raised fears of collusion between militants and the security forces.” [Scotsman, 6/1/2004]