Pakistan was not informed in advance about the raid on Osama compound, the CIA has said.
The CIA has said it did not keep Pakistan informed in advance to avoid the mission being jeopardised.
Meanwhile, the White House has said Osama Bin Laden was unarmed when killed by the US special forces.
Preliminary reports had said Osma himself took part in the firefight when he was shot.
The CIA has said photos of Bin Laden's body may be released at some point soon.
After Osma was killed in Abbottabad near the Pakistani capital Islamabad, the country faced a lot of tough questions from the US over how the al-Qaeda leader could live in comfort near Islamabad.
Many described the death of Bin Laden in Pakistan as a proof that the country was harbouring terrorists.
Pakistani President Asif Ali Zardari denied that it was a proof that his country was supporting militant groups, but he has not been able to answer the embarrassing questions his country has faced.
Mr Zardari has also said Pakistani forces did not take part in the raid.
Pakistan's spy agency has also said it is embarrased by its failures, media reports say.
After the news emerged about Osma's death in Pakistan, Afghan President Hamid Karzai
described Osama as the murderer of the Afghan people.
He also said Osma's death in Pakistan proved that the Afghans were right.
Mr Karzai agains emphasised that terrorist sanctuaries should be targted outside Afghan borders and the war on terror should be taken to the places from where they are fueled.
It is believed that Osma's death in Abbottabad may further strain the already frosty relations between Pakistan and the United States.