TOKYO — Nintendo reported Sunday that hackers had invaded a U.S. subsid’s site, but were unable to extract personal customer information.

The hacker group, Lulz Security or Lulzsec, which has trumpeted its recent breaches of Sony Pictures and Sony BMG sites to the media, claimed credit for the Nintendo invasion.

Nintendo is catching flak for sitting on news of the hack for nearly two weeks, but it emphasized that all the hackers managed to grab was a server configuration file. Hacking has become a blood sport since April invasions of Sony PlayStation Network and Qriocity services exposed the personal info of nearly 100 million users. The incursions have since continued on Sony sites around the world, though they do not seem to be centrally coordinated. Sony has since restored the services in the Americas, Europe and Asia outside of Japan, Hong Kong and South Korea.