Pakistan's President Pervez Musharraf says he does not believe Osama bin Laden planned the September 11 attacks on New York and Washington.
But General Pervez Musharraf - a strategic ally in America's war against terrorism - says he does think bin Laden was involved in the attacks in some way.
He did not say who he thinks was behind the attacks.
"I don't think it is possible that Osama sitting up there in the mountains could do it," he told The New Yorker magazine.
"He was perhaps the sponsor, the financier, the motivating force. But those who executed it were much more modern. They knew the US, they knew aviation. I don't think he has the intelligence or the minute planning. The planner was someone else."
The United States blames bin Laden and his al-Qaida network, which had a foothold in Afghanistan prior to September 11, for the attacks.
Pakistan was the chief backer of Afghanistan's ruling Taliban militia before September 11, after which Musharraf switched sides and joined the US led war against terrorism.