Developing: Possible Terror Threat Around 9/11 Anniversary

Developing at Fox News:

Federal authorities have come across what they believe may be a credible threat to the U.S. homeland surrounding the 10th anniversary of the Sept. 11, 2001, attacks, several sources tell Fox News.

The threat would target New York City or Washington, D.C., sources said. Authorities have obtained what they believe is information on possible suspects tied to central Al Qaeda, but they have not necessarily determined names of possible suspects.

According to a senior U.S. official with knowledge of the threat, “People are aggressively pursuing leads,” and it is “specific enough to elicit worry.” Another senior U.S. official stressed the threat is still “unconfirmed” so it is being chased down and investigated.

President Obama has been briefed on the seriousness of this threat, according to a senior administration official