Osama bin Laden's journal was recovered by US commandos after the raid that killed the al-Qaeda leader earlier this month, ABC News reported Wednesday.
The handwritten journal was among the trove of material seized by Navy SEALs in the May 2 assault on his hideout in Pakistan, dpa reported.
One US official quoted by ABC News described the book as a "professional journal" containing details of al-Qaeda's doctrine, potential terrorist targets and how to carry out the attacks.
After a handwriting study, US intelligence analysts concluded that the journal was written in bin Laden's hand, ABC News said.
The journal contained plots that included derailing US trains while traveling over bridges. US authorities issued an advisory to local and state governments based on that information last week, though they believed the idea never materialized.