A purported statement by Osama bin Laden's al Qaeda network denied it was behind Sunday's deadly bombing in Saudi Arabia and warned it would carry out a new attack on a major US city within two years.
The statement, carried on Islamist Web site al-Mojahedun (holy fighters), also said that the militant group was behind all attacks against US troops in Iraq.
It was not possible to verify the authenticity of the statement, written in language similar to previous al Qaeda statements.
But the website has in the past carried alleged statements by Saudi-born bin Laden's group.