Within 24 hours of the 9-11 anniversary attack on the United States consulate in Benghazi, U.S. intelligence agencies had strong indications al Qaeda–affiliated operatives were behind the attack, and had even pinpointed the location of one of those attackers. Three separate U.S. intelligence officials who spoke to The Daily Beast said the early information was enough to show that the attack was planned and the work of al Qaeda affiliates operating in Eastern Libya.

Nonetheless, it took until late last week for the White House and the administration to formally acknowledge that the Benghazi assault was a terrorist attack. On Sunday, Obama adviser Robert Gibbs explained the evolving narrative as a function of new information coming in quickly on the attacks. "We learned more information every single day about what happened,” Gibbs said on Fox News. “Nobody wants to get to the bottom of this faster than we do.”

The intelligence officials who spoke to The Daily Beast did so anonymously because they weren’t authorized to speak to the press. They said U.S. intelligence agencies developed leads on four of the participants of the attacks within 24 hours of the fire fight that took place mainly at an annex near the Benghazi consulate. For one of those individuals, the U.S. agencies were able to find his location after his use of social media. “We had two kinds of intelligence on one guy,” this official said. “We believe we had enough to target him.”

Another U.S. intelligence official said, “There was very good information on this in the first 24 hours. These guys have a return address. There are camps of people and a wide variety of things we could do.”

A spokesman for the National Security Council declined to comment for the story. But another U.S. intelligence official said, “I can’t get into specific numbers but soon after the attack we had a pretty good bead on some individuals involved in the attack.”

It’s unclear whether any of these suspected attackers have been targeted or arrested, and intelligence experts caution that these are still early days in a complex investigation.

The question of what the White House knew, and when they knew it, will be of keen interest to members of Congress in the election year. Last Thursday, the Obama administration formally briefed House and Senate members on the attack. Those briefings however failed to satisfy many members, particularly Republicans. “That is the most useless, worthless briefing I have attended in a long time,” Sen. Bob Corker, a Tennessee Republican, was quoted as saying.

The Daily Beast reported last week that the U.S. intelligence community was studying an intercept between a Libyan politician and a member of the so-called February 17 militia, Libyans charged with providing security for the U.S. consulate in Benghazi. More intelligence has come in that shows members of Ansar al-Sharia, an al Qaeda–affiliated group operating in and around Benghazi, were attempting to coerce, threaten, cajole, and bribe members of the militia protecting the consulate.