LOL of course it was...

Although now that I think of it, hacking and posting this type of "news" instead of the usual "you've been pwned hahaha" might be more effective in spreading panic.

For the technical standpoint, this might mean that it was not the server but some user's (who has access to post news on that site) PC that was hacked.

That is if we were to believe there was a hack and not someone accidentally spilling Putin's plans