SAN FRANCISCO – Sony's PlayStation network remains offline in an outage that began as video game players unwrapped new consoles on Christmas.
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Microsoft's Xbox Live service, which had also gone down, is back online but the company says some applications aren't fully functioning.
A Twitter account that calls itself Lizard Squad has taken credit for causing the disruption by overwhelming the companies' servers with a flood of Internet traffic.
A Twitter account called Lizard Squad in August also took credit for disrupting the PlayStation network and tweeted a report of a bomb on a plane carrying a Sony executive.
It's unclear if these episodes are related to the recent hack of Sony's movie division.