A little-known anti-fascist group says it was behind a bomb attack on an office of Greece's far-right Golden Dawn party.
The device was planted outside a branch of the party near Athens on Tuesday, but caused no injuries.
The Anti-Fascist Front said: "We decided to hit Golden Dawn's offices because we believe that you have to hit out at fascists first, before they hit you."
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Greek activists and politicians have called for Golden Dawn to be banned. Its members have been seen giving Nazi-style salutes but they deny it is neo-Nazi.