The hacker used Medvedev's page to declare the PM's intention to resign and pursue a career as a freelance photographer, a media outlet reported.

"I resign. I am ashamed for the actions of the government. I'm sorry," the first tweet said.

"I've been longing to say this. Vova [Putin]! you are wrong!" another tweet said.

Apparently the hacker is Russian, since the messages show good knowledge of Russian politics.

For instance, his/her latest tweet addressed to President Vladimir Putin is a reference to the famous words of Mikhail Gorbachev, who said "Boris, you are wrong!" to Boris Yeltsin in response to his criticism of the Communist Party in 1988.

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