A purported audio tape from a senior Saudi al-Qaeda leader said the militant group would carry out more attacks against US interests this year and urged Muslims to avoid US civilian and military sites.
But the tape released through a link on the Dirasat Islamist website, said last week's suicide car bombing of a security building in the Saudi capital Riyadh was not the work of al-Qaeda.
The Al Haramain Brigades, a Saudi militant group, have claimed responsibility for the Riyadh attack. They said they were followers of al-Qaeda leader Osama bin Laden and were filling in for al-Qaeda, which was preoccupied fighting "crusaders".