U.S. officials say there are no plans to raise the nation's terror threat level, after Thursday's broadcast of new audiotape from al-Qaida leader Osama bin Laden.
In the tape aired by Arab broadcaster al-Jazeera, bin Laden says there are plans for a new attack in the United States, but he offers a "long-term" truce if American forces pull out of Iraq and Afghanistan.
U.S. intelligence analysts said the voice on the tape was that of the al-Qaida leader.
The White House flatly rejected the offer of a truce, saying the United States does not negotiate with terrorists.
In an April 2004 message, the al-Qaida leader offered a similar truce to Europe that was rejected. In Thursday's message, bin Laden mentioned deadly terrorist bombings in European capitals.
The message is bin Laden's first since December 2004. Al-Jazeera says the tape was recorded this month.