The Obama administration is taking the threat of a still-unconfirmed terrorist attack seriously, after discovering there could be a possible al-Qaida plot tied to the 10th anniversary of the Sept. 11 attacks, President Obama's counterterrorism adviser John Brennan said Sunday.

During interviews with Fox News Sunday and CBS' Face the Nation, Brennan said the threat reported to U.S. authorities on Wednesday night remains specific and credible.

On Face the Nation, Brennan said counterterrorism officials have some information about the nature of the potential plans and the people who may be involved.

I don't want to compromise anything that could lead us to individuals who may be part of this plot, he said, explaining that he did not want to get into the details of the potential attack.

Concern About a Possible Vehicle-Based Attack in New York or D.C.

The Department of Homeland Security reportedly received unconfirmed threat information as the 10th anniversary of terrorist attacks loomed, agency spokesman Matt Chandler said in a Sept. 8 statement. The threat concerns a possible vehicle-borne attack against either New York or Washington, sponsored by al-Qaida, an unnamed government source told Bloomberg News.

While speaking on Fox News Sunday, Brennan said President Obama met with his national security team on Saturday, and again on Sunday morning, to review intelligence and confirm U.S. officials were pursuing all leads in regard to the terrorist threat.

We've been working very closely with state and local partners. Bulletins have gone out. We've had a number of individuals who have called in about suspicious vehicles. That is something that we want people to do, he said.