London, Nov.24 : Fresh links between Iran's Revolutionary Guards and al-Qaeda have been uncovered following interception of a letter from the terrorist leadership.
According to The Telegraph, the letter exposes the rising role of Saad bin Laden, son of the al-Qaeda leader, Osama, as an intermediary between the organisation and Iran.
Saad bin Laden has been living in Iran since the fall of the Taliban in Afghanistan in 2001, apparently under house arrest.
The letter, which was signed by Ayman al-Zawahiri, al-Qaeda's second in command, was written after the American embassy in Yemen was attacked by simultaneous suicide car bombs in September.
Western security officials said the missive thanked the leadership of Iran's Revolutionary Guards for providing assistance to al-Qaeda to set up its terrorist network in Yemen, which has suffered ten al-Qaeda-related terror attacks in the past year, including two bomb attacks against the American embassy.
In the letter al-Qaeda's leadership pays tribute to Iran's generosity, stating that without its "monetary and infrastructure assistance" it would have not been possible for the group to carry out the terror attacks.
In the past, there has been intense speculation about the level of Iranian support for al-Qaeda since the 9/11 Commission report into al-Qaeda's terror attacks against the U.S. in 2001 concluded that Iran had provided safe passage for many of the 9/11 hijackers travelling between Afghanistan and Saudi Arabia prior to the attacks.