U.S. officials say Osama bin Laden's journal contains information about future terror plots, and shows the al-Qaida leader was communicating with other terrorists.
The officials, who spoke on the condition of anonymity, said Wednesday the notebook details the terror network's doctrine, potential targets and how to carry out attacks against them. It describes plots against the U.S. rail system and the importance of attacking the United States.
Bin Laden is believed to have personally written the journal, which U.S. Navy SEALs seized from his compound in northern Pakistan during the May 2 operation that killed him.
Meanwhile, the leader of al-Qaida in the Arabian Peninsula has warned the United States of more attacks in retaliation for the raid.
In a statement posted on the Internet Wednesday, Yemen-based Nasser al-Wahishi said Americans should not think the "matter will be over" with bin Laden's death. He said "what is coming is greater and worse."
The warning came as U.S. Senator John Kerry announced he will travel to Pakistan next week in a bid to reset bilateral relations. The raid on bin Laden's compound in the garrison city of Abbottabad has further strained relations between the U.S. and Pakistan.
Another U.S. lawmaker, U.S. House of Representatives Intelligence Committee Chairman Mike Rogers, said Wednesday there may have been "elements" in Pakistan who knew bin Laden was hiding in the country. But he said so far there are no indications that senior Pakistani officials knew about bin Laden's presence and provided safe haven.
Pakistani Prime Minister Yousuf Raza Gilani has rejected criticism of Pakistan's military and spy agency for not detecting bin Laden was in the country, and dismissed allegations that authorities were aligned with al-Qaida.
He has also criticized the U.S. raid, warning of "serious consequences" from such unilateral actions.