PlayStation Network back online after four-day outage

http://en.wikipedia.org/wiki/Sony

The Sony Corporation’s PlayStation Network had connection problems for a fourth day since hackers attacked the video game network, and the company said on Sunday that service was gradually being restored.

The hacker activist group known as Lizard Squad has claimed responsibility for disrupting both the PlayStation Network and Microsoft Corporation’s Xbox Live on Christmas Day. Service was restored to Xbox Live on Friday.

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Story added 29. December 2014, content source with full text you can find at link above.