CAIRO, Egypt – Al-Jazeera on Thursday aired an audiotape from Osama bin Laden, who says al-Qaida is making preparations for attacks in the United States but offers a truce on “fair” but undefined conditions.

The tape’s release came days after a U.S. airstrike in Pakistan that was targeting bin Laden’s deputy, Ayman al-Zawahri, and reportedly killed four leading al-Qaida figures, including possibly al-Zawahri’s son-in-law. There was no mention of the attack on the segments that were broadcast.

It was the first tape from the al-Qaida leader in more than a year – the longest period without a message since the Sept. 11 suicide hijackings in the United States.

The CIA has authenticated the voice on the tape as that of bin Laden, an agency official said. The al-Qaida leader is believed to be hiding in the border region between Afghanistan and Pakistan.

Al-Jazeera said the tape was recorded in the Islamic month that corresponds with December.

Bin Laden refers to an alleged comment by President Bush about bombing the Qatar headquarters of Al-Jazeera, which was first reported in the British press on Nov. 22.

He also refers indirectly to the July 7 bombings in London that killed 56 people and to poll numbers that showed a fall in Bush’s popularity, as occurred in late 2005.

U.S. counterterror officials said Thursday they have seen no specific or credible intelligence to indicate an upcoming al-Qaida attack on the country.

The United States will not let up in the war on terror despite the threats on the tape, said White House press secretary Scott McClellan. “We do not negotiate with terrorists,” McClellan said. “We put them out of business.”

Although officials at intelligence and law enforcement agencies warn against downplaying the taped threat, they said there has been no recent increase in “chatter” that can indicate that such an attack is imminent.

In the tape, bin Laden said his message was directed to the American people after polls showed that “an overwhelming majority of you want the withdrawal of American troops from Iraq but (Bush) opposed that desire.”

He said insurgents were winning the conflict in Iraq and warned that security measures in the West and the United States could not prevent attacks there.

“The proof of that is the explosions you have seen in the capitals of European nations,” he said “The delay in similar operations happening in America has not been because of failure to break through your security measures. The operations are under preparation and you will see them in your homes the minute they are through [with preparations]….”

The al-Qaida leader did not spell out conditions for a truce in the excerpts aired by Al-Jazeera.

“We do not mind offering you a long-term truce with fair conditions that we adhere to,” he said. “We are a nation that God has forbidden to lie and cheat. So both sides can enjoy security and stability under this truce so we can build Iraq and Afghanistan, which have been destroyed in this war.

“There is no shame in this solution, which prevents the wasting of billions of dollars that have gone to those with influence and merchants of war in America,” he said.

In an Arabic transcription of the entire tape on the Al-Jazeera Web site – but not aired – bin Laden makes an oblique reference to how to prevent new attacks on the United States, but does not specify if these are conditions for a truce.