Sony PlayStation has recently been hit by a cyber-attack which has brought down its network and PlayStation Store.
Hacktivist group Lizard Squad claimed responsibility for the attack when Sony's PlayStation network became unreachable to PS4 and PS3 users just after midnight on the 7th December.
The Lizard Squad tweeted the message: "PSN Login #offline #LizardSquad."
The outage on the PlayStation network comes a week after LizardSquad claimed responsibility for a similar day-long outage on Microsoft Xbox network.
DDos attacks like this are commonly used by competitors or activists who take services offline using a variety of techniques that make services impossible to reach.
This was not the first attack on Sony's PlayStation, as back in 2011 Sony's Playstation Network was offline for more than three weeks after a hack compromised the personal information of millions of customers.
LizardSquad said this Xbox attack was just a "small dose" of what is to come over the Christmas season.
Sony Entertainment said the latest outage is under investigation and there are no signs of any data being stolen.
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