Washington The FBI issued a new terrorism warning Monday asking Americans and law enforcement to be on the highest alert for possible attacks this week in the United States and abroad.
The alert was based on new information that was deemed credible but was "not specific as to intended targets or as to intended methods," FBI Director Robert Mueller said.
The warning went out to 18,000 law enforcement agencies.
"The administration has concluded based on information developed that there may be additional terrorist attacks within the United States and against United States interests over the next week," Atty. Gen. John Ashcroft said.
He said that while the information was not specific, the FBI was issuing the alert to the American people because "they can make good judgments and can understand this kind of information."
The attorney general asked citizens to be patient if they encounter additional security measures and to note any suspicious activities.
"We urge Americans in the course of their normal activities to remain alert and to report unusual circumstances and inappropriate behavior to the appropriate authorities," he said.
Mueller and Ashcroft declined to discuss the nature or source of the information that prompted the warning, saying only that it was deemed credible.
The alert is the second this month. On Oct. 11 the FBI said it had gathered "certain information" that additional terrorism attacks could occur within days.