In an interview with Chinese state television Pakistani President Pervez Musharraf said there was a "great possibility" Osama bin Laden was dead.
Osama bin Laden (left) - alive and well in a scene from the disputed video.
Pakistani President Pervez Musharraf said bin Laden might well have been killed during the U.S. bombing raids on Afghanistan.
Bin Laden was believed to be hiding in underground caves in Afghanistan's Tora Bora mountain region.
Washington heavily bombed the cave-riddled peaks during the past weeks.
"There is the great possibility that he may have lost his life there," Musharraf said. "Maybe he is dead because of all the operations that have been conducted, the bombardment of all the caves that have been conducted."
Musharraf added that Pakistan was still keeping a close watch on its border with Afghanistan. He said if bin Laden was found, he would be handed over to the Americans.
On Monday, the spokesman for the U.S.-led anti-terror coalition, Kenton Keith, also said it might well be possible that bin Laden was dead.
Keith told journalists he had no conclusive evidence, but that bin Laden could well have been killed during the U.S. bombing raids.
The United States has said it does not know bin Laden's whereabouts but has vowed to pursue the Saudi-born militant until he is captured or killed.
Bin Laden's mother: video is fake
A British newspaper on Sunday quoted Osama bin Laden's mother as saying she believes the videotape of her son which the U.S. released earlier this month is a fake.
According to the U.S., the video proves bin Laden had prior knowledge of the September 11 attacks.
"I believe the evidence against him is not solid. I think the video they produced is doctored," Britain's Mail on Sunday quotes Alia Ghanem as saying.
Ghanem said she was convinced her son was not responsible for the attacks but feared he would be killed before his name was cleared.
The U.S. still seeks to capture the man blamed for the attacks on Washington and New York. Some 3,300 people were killed in the September 11 terrorist attacks.
There is a $25 million (€ 28 million) bounty on Osama bin Laden's head.