Within a longer WoTR article on how to use the newly released documents from Bin Laden's home in Abbottabad I spotted this:
The al Qaeda operatives holed up in Iran have always been a big black hole in understanding al Qaeda. Why did they go there? What were they up to? Was Iran in bed with al Qaeda? Check out this document in particular and others describing the Iran linkages with al Qaeda. It appears al Qaeda lost a lot of manpower to Iranian detention. It’s possible that the reason for al Qaeda’s weak showing in Libya post-Arab Spring was due to its losing many of its key former members of the Islamic Fighting Group to Iran’s prisons. The entire Iran aspect in these documents is new stuff.
Link:

Follow the underlined link to the document (6 pg PDF in English):http://warontherocks.com/2015/05/con.../?singlepage=1