WASHINGTON (AP) -- In the high-tech equivalent of a thief burglarizing police headquarters, a hacker vandalized a prominent Internet site devoted to computer security using an unusually clever tactic.

The embarrassing electronic assault against the AntiOnline site Thursday occurred days after other hackers altered the Web site for Symantec Corp., whose software is used by millions of consumers to protect against viruses and electronic snoops.In the latest incident, a hacker using an Internet account in Russia successfully tricked the site's computer to load hidden software code from elsewhere onto one of its own Web pages, called "Eye on the Underground."

The site was fixed just over an hour later, but this week's attacks raised questions about Internet security.

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