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Wired’s Threat Level blog reported late Sunday that “an Army intelligence analyst who boasted of giving classified U.S. combat video and hundreds of thousands of classified State Department records to whistleblower site Wikileaks,” was arrested by the Pentagon.

The leaked video, which was filmed in Baghdad in 2007 during an operation that killed civilians, including two Reuters journalists, was published online by Wikileaks in April.

Kevin Poulsen and Kim Zetter of Threat Level wrote:

Specialist Bradley Manning, 22, of Potomac, Md., was stationed at Forward Operating Base Hammer, 40 miles east of Baghdad, where he was arrested nearly two weeks ago by the Army’s Criminal Investigation Division. A family member says he’s being held in custody in Kuwait and has not been formally charged. Manning was turned in late last month by a former computer hacker with whom he spoke online. In the course of their chats, Manning took credit for leaking a headline-making video of a helicopter attack that Wikileaks posted online in April.

According to Wired, “Manning came to the attention of the F.B.I. and Army investigators after he contacted former hacker Adrian Lamo late last month over instant messenger and e-mail.”

Comments posted on the Wikileaks Twitter feed on Monday warned journalists not to trust Mr. Lamo or Mr. Poulsen, but also said:

We are investigating the claims, if true, sources should be reminded to ONLY SPEAK TO WIKILEAKS. We never collect personal information on our sources, so we are are unable as yet to confirm the Manning story. Allegations in Wired that we have been sent 260,000 classified U.S. embassy cables are, as far as we can tell, incorrect. If Brad Manning, 22, is the “Collateral Murder” & Garani massacre whistleblower then, without doubt, he’s a national hero.

NPR’s news blog, The Two-Way, posted this statement from the Pentagon within the past hour: