The hackers gained access to the admin panel of the RT website and managed to publish several articles containing "Nazi" word in the headline.
The security breach also has been confirmed by the Russian Today in its official twitter account saying "Hackers deface RT.com website, crack admin access, place "Nazi" in every headline. Back to normal now.".
Some of the published articles are entitled "Russian Senators vote to use stabilizing Nazi forces on Ukrainian territory", "Nazi nationalist leader calls on 'most wanted' Nazi umarov' to act against Russia' ".
The website has been restored and back to normal. But still, no hackers appear to have taken credit for the breach.