The hacking group also said it hit other websites run by News International, News Corp.

WSJ: Hackers Claim 'Sun' Site Hit

The alleged hacking was significant because the documents came from the government-run Public Access to Court Electronic Records, or PACER, which typically charges a fee, which was 8 cents a page in 2009.

CNN: Internet prodigy, activist Aaron Swartz commits suicide

Instead David spends 60 hours a week helping run Anonymous Operations, the supposedly elite arm of the troublemaking hacking group called Anonymous that orchestrated a massive computer network attack against MasterCard, Visa and PayPal in November in retaliation for their freezing donor payments to WikiLeaks.

FORBES: Magazine Article

The operation is being run alongside Scotland Yard's Operation Weeting, which is looking into phone hacking.

BBC: John Terry

The investigation is being supervised by the Independent Police Complaints Commission and is being run in conjunction with Operation Weeting, the Met's inquiry into the phone-hacking scandal.

BBC: Scotland Yard

Both exploits take advantage of the Blackhole exploit kit, an off-the-shelf hacking tool that was updated last month to prey on the Java vulnerability, such that users who run the Java plug-in can have their PC entirely compromised via their browser when they visit an infected site.

FORBES: Beware Fake Microsoft And Amazon Emails Exploiting Java Security Vulnerability