"The fascist attack on the home of @ArisPortosalte is an attack on everything we want to protect," government spokesperson Stelios Petsas posted on his Twitter account late on Thursday night.
"It is an attack against the freedom of expression. It is an attack against democracy. We condemn these attacks. But do we all?" Petsas added in his tweet.
Earlier the same day, members of the anarchist group Rubicon had vandalised the home of Greek journalist Aris Portosalte, spraying insulting graffiti targeting the journalist and the broadcaster that he works for on the walls, as well as strewing flyers with similar slogans outside Portosalte's house in the Athens suburb of Vrilissia.
Shortly afterward, the anarchist group posted the reasons for the attack on its website.