Update Sony now says the PlayStation Network is back online, and added that they have "seen no evidence of any intrusion to the network and no evidence of any unauthorized access to users' personal information."
Sony is currently dealing with a denial of service attack on its PlayStation Network online service, affecting users of its PlayStation 3, PS4 and PS Vita game consoles. The attack is also causing issues with connecting with the Sony Entertainment Network.
The attacks began late on Saturday night and a hacker group claimed on Twitter that they are resposible for the issues. The same group also claims responsibility for similar DDOS attacks on other gaming servers. In a blog post, Sony stated, "Although this has impacted your ability to access our network and enjoy our services, no personal information has been accessed. We will continue to work towards fixing this issue and hope to have our services up and running as soon as possible. We regret any inconvenience this may have caused."
This same hacker group is trying to extend their attacks to real people. The group posted a fake bomb threat, via Twitter, directed at a airline flight heading to San Diego this morning which had Sony Online Entertainment president John Smedley on board. The flight was diverted to Phoenix as a security precaution.
Source: PlayStation Blog via Shacknews