The Guardian has an in-depth report on the the hunt for Osama Bin Laden.

The al-Qaida leader is said to be hiding in northern Pakistan guarded by a 120-mile ring of tribesmen whose job it is to warn of the approach of any troops.

Inside them is a tighter ring, around 12 miles in diameter, made up of tribal elders who would warn if the outer ring were breached. At the centre of the circles is Bin Laden himself, protected by one or two of his closest relatives and advisers. Bin Laden has agreed with the elders that he will use no electronic communications and will move only at night and between specified places within a limited radius.

The article says that Bin Laden is communicating by handwritten notes. The primary source of the information appears to be Mansoor Ijaz, an American financier of Pakistani origin who has spent years tracking Bin Laden and his operations. We've seen Mr. Ijaz many times on Fox News.

The article seems to place great credibility on Mr. Ijaz' theory, but we don't get a sense from it as to whether the U.S. similarly credits his information.