Osama bin Laden's 16-year-old son led a suicide bomb squad sent to kill Pakistan opposition leader Benazir Bhutto, according to her own claims.

Before she was assassinated in December the former prime minister claimed she had been warned that four such death teams would try to kill her.

And the naming of bin Laden's teenage son, Hamza, could now strengthen claims that he is being groomed as a future leader of the al Qaeda terror group.

(CNN) -- Two months before her death, former Pakistani Prime Minister Benazir Bhutto sent an e-mail to her U.S. adviser and longtime friend, saying that if she were killed, Pakistani President Pervez Musharraf would bear some of the blame.

"Just wanted u to know if it does in addition to the names in my letter to Musharaf of Oct 16nth, I wld hold Musharaf responsible. I have been made to feel insecure by his minions and there is no way what is happening in terms of stopping me from taking private cars or using tinted windows or giving jammers or four police mobiles to cover all sides cld happen without him."

Al Qaeda-linked militants denied being behind the killing of the 54-year-old former prime minister although the government of nuclear-armed Pakistan, a key U.S. ally in fighting terrorism, had said on Friday it had proof of their involvement.