Media Molecule said that the PSN is once again, hacked. The downtime may last up to two days depending on how successful they get in getting the server back up online. Do not enter any personal information (credit card information etc.) until the site says it’s OK. Even once the site is OK, please wait at least 2 hours to make sure it’s a legitimate announcement. But for the moment, you should be patient and don’t worry about it. The downtime is expected to last for another while yet.
Source: https://thehackernews.com/2011/04/playstation-network-hacked-information.html