title – 9/11 Anniversary Terror Threat Being Taken Seriously By White House: John Brennan (VIDEO)

WASHINGTON (AP/The Huffington Post) — The Obama administration is taking serious the still unconfirmed intelligence tip of a possible al-Qaeda plot tied to the 10th anniversary of the Sept. 11 terrorist attacks, counterterrorism adviser John Brennan said Sunday.

The threat reported to authorities Wednesday night remains “specific and credible,” Brennan said during interviews with “Fox News Sunday” and CBS’ “Face the Nation.”

“Again, it’s not confirmed, but the president wants to make sure that we leave no stone unturned,” he said. “And that’s what the intelligence, law enforcement and homeland security communities are doing.”

Investigators have chased a tip that al-Qaeda may have sent three men to the U.S. on a mission to detonate a car bomb in either Washington or New York. But officials have said they’ve found no evidence al-Qaeda has sneaked anyone into the country.

Brennan said officials are “looking at travel data, other types of pieces of information and trying to correlate them against that reporting that has come in.”

“It’s not confirmed but we are not relaxing at all,” he said. “This is a 24/7, round-the-clock effort by all elements of the U.S. counterterrorism community both here in the United States as well as abroad.”