UPDATE via L.A. Times email alert: Officials confirm 'credible' 9/11 threat
At least three individuals -- one believed to be a U.S. citizen -- entered the U.S. in August by air with the intent to launch a vehicle-borne attack against Washington D.C. or New York around the anniversary of 9-11, according to intelligence officials. As news of the information became public authorities began weighing whether to raise the national threat level.
The suspected terrorists are believed to have embarked on their journey to the U.S. from Afghanistan, according to one senior official taking a route that took them through at least one other country, possibly Iran. [...]
The threat, one official told ABC, is credible. Now authorities are making every effort to confirm it and to hunt down any plotters.
U.S. officials said Thursday evening they have "specific, credible but unconfirmed" information about a threat against the United States coinciding with the 10th anniversary of the September 11 terrorist attacks. [...]
A government official told CNN that members of Congress were briefed by White House and intelligence officials Thursday about the threat.