Al Jazeera television has reported that Al-Qaida has a new leader.
The terrorist group is understood to have appointed Egyptian militant Saif al-Adel as temporary leader.
Mustafa al-Yemeni, whose nationality is not known, will direct operations, according to the Arabic news service.
Former leader Osama bin Laden was shot dead by US troops at a compound in Pakistan earlier this month.
US prosecutors say interim leader al-Adel helped plan bomb attacks on American embassies in Nairobi and Dar es Salaam in 1998.