In late January, an Al Qaeda operative headed from Pakistan on his way to Yemen was arrested in the Persian Gulf country of Oman, a U.S. counter-terrorism official confirmed.

There has been no public announcement of the arrest. But in a possible indication of the operative's importance, just a few days later, two postings on a jihadi web forum suggested that Al Qaeda leaders were worried and wanted their "commanders" to take immediate precautions.

The postings stated that the "captured brother" -- identified as a "field commander" named Abdullah Saleh al-Eidan who went by the name of "Barud"- - was "on his way back from Afghanistan" and had been turned over to Saudi authorities.

Even more noteworthy, the postings -written by a fellow Al Qaeda "brother" - reported that Al Eidan had with him 300 "important phone numbers" as well as pictures, names and documents from Afghanistan.

"The brother requested that this information reach the commanders in Yemen and Afghanistan as soon as possible," read one of the postings, which appeared on a web forum known as Fallujah Islamic Forum.  "He also asked.the commanders to change their places of residence and mobile phone numbers as soon as possible."

While unable to confirm the specific figures in the web postings about Eidan's phone numbers and documents, the U.S. counter-terrorism official said that Eidan was in fact an Al Qaeda courier on a mission to Yemen and that his capture was providing "useful" intelligence about the terror group's operations.The official did not provide any details on how Eidan came to be arrested by authorities in Oman.  

It is difficult to assess at this stage how significant the arrest of the Al Qaeda operative may be. But Evan Kohlmann, a counter-terrorism specialist who provides analysis for U.S. government agencies and who first spotted the web postings, told Declassified: "These kind of grabs are not all that common."  "The idea that he would have personnel files on such a large cross section of Al Qaeda fighters is a remarkable gain," said Kohlmann.

At the same time, the capture of Eidan may suggest that the connections between Al Qaeda's central leadership and Al Qaeda in the Arabian Peninsula (AQAP)-as the group's affiliate in Yemen is called-- may be greater than U.S. officials have previously thought.

Just last month, when asked at a White House press briefing what was the most "shocking, stunning thing" he had learned from the administration's review of the Christmas Day bombing incident, John Brennan, President Obama's counter-terrorism advisor, replied: "Al Qaeda in the Arabian Peninsula is an extension of Al Qaeda core coming out of Pakistan. We had a strategic sense of sort of where they were going, but we didn't know they had progressed to the point of actually launching individuals here."

Just a few weeks later, Osama bin Laden released a brief audio message-from "Osama to Obama"-in which he praised the attempt to blow up Northwest Flight 253 over Detroit and called bombing suspect Omar Farouk Abdulmutallab a "hero."

At the time, U.S. security officials and others noted that bin Laden didn't actually take credit for ordering the bombing of the Northwest flight.

But the capture of Eidan-and his documents showing the apparent communication flow between Al Qaeda commanders in Afghanistan and Yemen-- could at least raise questions about whether bin Laden or his top confederates may have known more about it in advance than anybody initially suspected.

http://blog.newsweek.com/blogs/declassified/archive/2010/02/14/exclusive-a-u-s-intelligence-breakthrough-in-the-persian-gulf.aspx