It is not that difficult to hack a twitter account. But I am surprised that it went unnoticed for quite some time. The tweet was removed after a considerable delay. What happened?
I think it was not hacked, but an attempt by the gov to damage the reputation. After all, they can login to any twitter account
What government?
USA?
If so, this really was smart move.
I think Russians will be afraid now to use social networks for some time