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Irish police release hacking suspect

In this Saturday, Feb. 11, 2012, photo, protestors wearing Guy Fawks masks hold the logos of the international hacker group Anonymous during a demonstration against Anti-Counterfeiting Trade Agreement, ACTA, in Budapest, Hungary. The shadowy world of Internet hackers and pranksters was rocked by news Tuesday, March 6, 2012, that Hector Xavier Monsegur, 28, one of the world’s most-wanted and most-feared computer vandals has been an FBI informant for months and helped authorities build a case against five alleged comrades. (AP Photo/MTI, Janos Marjai)

DUBLIN (AP) -- Irish police say they have released without charge a 19-year-old student accused by U.S. authorities of breaking into the email account of Ireland's top cybersecurity cop and using its contents to eavesdrop on American and British anti-hacking detectives.

Trinity College student Donncha O Cearbhaill walked free Wednesday from Terenure police station in south Dublin a day after his arrest following a U.S. indictment for hacking offenses.

An FBI affidavit quotes secretly recorded communications between O Cearbhaill and a U.S. hacker-turned-FBI mole discussing O Cearbhaill's efforts against Irish, American and British law enforcement officials.

Police say they are preparing an evidence file against O Cearbhaill to be presented to Irish state prosecutors.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

LONDON (AP) -- Hackers claiming allegiance to the amorphous Anonymous movement say they've defaced several sites belonging to online defense firm Panda Security.

Anonymous supporters have been rattled by a trans-Atlantic investigation that has exposed one of the group's best-known hackers, Sabu, as an alleged FBI informant.

U.S. and British officials charged six men and one adolescent with a host of computer crimes linked to Sabu's activities Tuesday, sowing anger and confusion among supporters of the loose-knit network.

But the group fired back with an attack against dozens of Panda Security subsites, accusing the company of working with law enforcement.

The Bilbao, Spain-based Panda Security said Wednesday its main site wasn't compromised.

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Online:

Panda Security: http://www.pandasecurity.com/