Dubai: The head of Al Qaida's Yemen-based wing vowed to fight on after the killing of Osama Bin Laden saying "what is coming is greater and worse", in a statement posted on the Internet Tuesday.

"You have to fight one generation after the other, until your life is ruined, your days are disturbed and you face disgrace. The fight between us and you was not led by Osama alone," said Nasser Al Wuhayshi, addressing Al Qaida's enemies.

"What is coming is greater and worse, and what you will be facing is more intense and harmful," said the leader of Al Qaida in the Arabian Peninsula (AQAP), in a eulogy to Osama Bin Laden posted on the militant outfit's website As-Ansar.

AQAP is seen as one of Al Qaida's most aggressive regional wings. It has staged several foiled strikes on US and Saudi targets, using novel tactics.

Personal aide

US forces killed Bin Laden in a raid on his hideout in Pakistan last week after a nearly 10-year hunt for one of the main orchestrators of the September 11, 2001 attacks.

Nasser Al Wuhayshi, also a top target of US forces, was a close personal aide to Bin Laden in Afghanistan in the 1990s, and he has stuck closely to the leader's ideology and operational tactics. Analysts have said AQAP may step further into the spotlight after the death of Osama Bin Laden, possibly by organising revenge attacks.

AQAP has claimed responsibility for a foiled 2009 attempt to blow up a Detroit-bound plane.