F-Secure's chief research officer told the Finnish media that one of the hackers who put PlayStation Network and XboxLive on Christmas Day December 25 was in Finland.

On the morning of December 25, the Sony PlayStation Network and Xbox Live
were unavailable due to DDoS attacks. On December 26, Xbox Live was restored, and PSN was up and running only yesterday, three days after the attack.
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Responsibility assumed grouping Lizard Squad. Earlier, the group attacked Sony and Riot Games, and yesterday hackers
tried to attack Tor . Anonymous activists have already declared war on the Lizard Squad, so that we can watch the process.
Mikko Hipponen, head of research at F-Secure, said that the group’s members are based in the USA, Canada and the UK, and at least one of them is in Finland.