Attorney General John Ashcroft said the threat level assessment was raised because of specific intelligence ... corroborated by multiple intelligence sources, as well as a steadily rising number of conversations among suspected members and sympathizers of Osama bin Ladens al-Qaida terror network regarding possible attacks.
He said the intelligence information suggested that al-Qaida may be planning attacks on hotels, apartment buildings or other lightly guarded soft targets where people gathered or lived, timed to coincide with the Hajj the annual Muslim pilgrimage to Mecca in Saudi Arabia, Islams holiest site. The holy period begins Saturday and ends in mid-February.
Also at risk are economic targets, including the transportation and energy sectors, as well as symbolic targets and symbols of American power, he said.
OTHER FACTORS LED TO DECISION
Administration officials told NBC News on condition of anonymity that a number of other factors also played a role in the decision to raise the threat assessment. Among them, they said, was the discovery in early January of ricin, one of the worlds deadliest poisons, in a London apartmenr used by suspected terrorists linked to al-Qaida and the bombing in October of a night club in Bali, suggesting that al-Qaida was shifting strategy to focus on so-called soft targets.
A U.S. law enforcement official told NBC News on condition of anonymity that the decision also was based in part on intelligence indicating that a Pakistani man entered the country sometime after September 2001.
The FBI has not labeled the man, Mohammed Sher Mohammad Khan, a terrorist but wants to question him immediately, the official said.
The search for Khan was not the primary reason for the increased threat level, but it was a factor, the official said.