A new audio message attributed to al-Qaida leader Osama bin Laden claims responsibility for the failed Christmas day airliner bombing attempt in the United States.
The audio message, aired by Al-Jazeera television Sunday, said al-Qaida would launch more attacks against the United States as long as it continues to support Israel.
The message also said there will be no U.S. security until Palestinians are secure.
White House adviser David Axelrod told CNN television Sunday the message contains a "hollow justification for the mass slaughter of innocents."
He said the U.S. cannot immediately authenticate the voice on the recording. However, the voice resembles previous recordings attributed to bin Laden.
On December 25, a 23-year-old Nigerian man, Umar Farouk Abdulmutallab tried to detonate explosives on a U.S.-bound jetliner with nearly 300 people on board. The plane landed safely in the city of Detroit after passengers and crew subdued the bomber.