Osama bin Laden's son Saad, a prominent figure in the murky relationship between Iran and al Qaeda, has left that country and is believed to be in Pakistan, U.S. intelligence said. "The person you are talking about (Sa'ad bin Laden) has left Iran. He's not there. He's probably in Pakistan," Director of National Intelligence Michael McConnell told reporters on Friday. Sa'ad bin Laden, who is believed to have played a role in several al Qaeda attacks, was reported to have been living in Iran since the U.S.-led invasion of Afghanistan in 2001 that ousted the Taliban government shielding al Qaeda. He is believed to have been under house arrest in recent years, but some reports say he also may have acted as an intermediary with Iran. The U.S. government lists him as having been born in 1982. The United States and Saudi Arabia have sought the repatriation of al Qaeda members in Iran. A U.S. counterterrorism official described the younger bin Laden as "a very well-connected apprentice terrorist." McConnell declined to say whether there was any deal that led to Sa'ad bin Laden's relocation, and the counterterrorism official said the circumstances of his departure from Iran were unclear. But McConnell suggested bin Laden's relocation to Pakistan was promising for U.S. counterterrorism efforts. "It's better for my world if any of these players are in places that we have access," he said. U.S. officials have spoken of a growing success in crippling al Qaeda's central leadership through pressure on the Pakistan border areas with Afghanistan, where the elder bin Laden and top deputies are believed to be hiding.