BENGHAZI – The attack that killed four Americans in Libya, including the US ambassador, was an organized two-part operation by heavily armed militants that included a precisely timed raid on a supposedly secret safe house just as Libyan and US security forces were arriving to rescue evacuated consulate staff, a senior Libyan security official said Thursday. Wanis El-Sharef, eastern Libya's deputy interior minister, said the attacks Tuesday night were suspected to have been timed to mark the 9/11 anniversary and that the militants used civilians protesting an anti-Islam film as cover for their action. Infiltrators within the security forces may have tipped off militants to the safe house location, he said. Ambassador Chris Stevens and another American were killed during the initial violence, he said. – AP