* Was seen as most likely successor to Osama bin Laden
* Has vowed to continue fight against U.S. and allies
(Adds U.S. official comment paragraphs 6-8)
By Sara Anabtawi
DUBAI, June 16 (Reuters) - Veteran militant Ayman al-Zawahri has taken command of al Qaeda after the killing of Osama bin Laden, an Islamist website said on Thursday, a move widely expected following his long years as second-in-command.
* Has vowed to continue fight against U.S. and allies
(Adds U.S. official comment paragraphs 6-8)
By Sara Anabtawi
DUBAI, June 16 (Reuters) - Veteran militant Ayman al-Zawahri has taken command of al Qaeda after the killing of Osama bin Laden, an Islamist website said on Thursday, a move widely expected following his long years as second-in-command.