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Nintendo acknowledged today that hackers broke into one of the servers for its U.S. business, but the company said there was no loss of sensitive company or user data.

The hacker group Lulzsec, which recently defaced PBS and Sony web sites, said that it broke into a Nintendo server and it was not systematically attacking the company. But the danger of the break-in was nowhere near as serious as the hack attack that took down Sony’s 77-million member PlayStation Network for a month.

“The server contained no consumer information. The protection of our customer information is our utmost priority,” said Nintendo of America, the U.S. branch of Nintendo, in an e-mailed statement to Reuters. “We constantly monitor our security.”

Lulzsec posted the results of its Nintendo attack, but the data wasn’t useful from its point of view. It said, “we sincerely hope Nintendo plugs the gap.”

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