U.S. President Barack Obama has validated death reports of the mastermind of the September 11, 2001 attacks against the United States.

The world's most wanted man, Osama bin Laden, is now dead and the U.S. government holds possession of his body.

In a televised announcement on late Sunday evening, Obama confirmed bin Laden’s death which is the result of US troop’s response upon the orders to capture or kill bin Laden.

Obama said a small troop carried out the operation. "After a firefight they killed Osama bin Laden and took custody of his body" he said.

According to CNN reports, bin Laden was killed last week in a mansion with other family members outside Islamabad, the capital of Pakistan.

"This is our most significant achievement to date in our nation's attempt to defeat Al Qaeda. His demise should be welcomed by all who believe in peace and human dignity." Obama said.

In the contrary, a senior U.S. counterterrorism official accounted that bin Laden was killed in a ground operation in Pakistan and not by a Predator drone.

Bin Laden was believed to be hiding in a mountainous region along the Pakistan-Afghanistan border. The officials who shared this information remained anonymous in order to speak ahead of the president.

Robert Fisk, foreign correspondent for the Independent newspaper had met and interviewed bin Laden three times. Frisk told Al Jazeera that his death would not have any impact on Al Qaeda's operations or on the Muslim world.

"I don't really think Al Qaeda needs a leadership and I don't doubt very much bin Laden was still the leader. He was certainly the founder ... but to suggest he was in control of Al Qaeda ... is complete rubbish,” Frisk added.