The attack was carried out by four CIA-operated unmanned Predator drones which launched four Hellfire missiles at a mud-walled compound, destroying three houses several hundred yards apart [REF].
Two Pakistani intelligence officials said Libyan-born Abu Faraj al-Libbi, who was captured in Pakistan in May 2005, told interrogators that he had met al-Zawahiri last year at the home of Bakhtpur Khan, one of the thirteen villagers killed in the airstrike.