Ayman al-Zawahiri appointed as al-Qaeda leader

The long-serving second-in-command of al-Qaeda, Ayman al-Zawahiri, has been appointed its head following the death of Osama Bin Laden, the militant organisation said in a statement.

Bin Laden was killed by US forces in Pakistan in early May.

Al-Qaeda warned it would continue to fight a holy war against the US and Israel under Zawahiri's direction.

Abdel Barri Atwan, author of A Secret History of Al Qaeda told the BBC al-Zawahiri would be more hostile to the west than Osama Bin Laden.