(WorldTribune.com) – Saudi opposition sources said Saudi security commanders knew of the location of Al Qaida chief Abul Aziz Al Muqrin at least three days before he executed a U.S. hostage. The Washington-based Saudi Institute said Saudi authorities knew of the whereabouts of the Al Qaida cell that abducted and threatened to kill Lockheed Martin engineer Paul Johnson. But the institute said the Saudi government decided not to move until Johnson, captured on June 12, was executed. “The Saudi government knew the location of a number of the terrorists but waited until they killed American hostage Paul Johnson before moving against them,” the Saudi Institute said in a statement on Tuesday.