Whenever PSN service goes down without any notice, the PSN hack story is the first thing that hits our minds. The service is down in Europe (may be in some other regions too) for the time being and no probable cause has been revealed yet. Here is what they had to say on via twitter:
We’re aware that some of you are having issues trying to log into PSN. We’re working to resolve the issue, and we’ll update you here.
It was almost 5 hours ago and no updates have been posted after that. The service is online in other regions so we can say that it should be back up soon hoping that there is nothing serious. Let us know if the service is working for you or not. We will update you as soon as we have something from Sony’s end.
Update: The service has bee restored back to normal.