A bomb went off at the offices of a Greek ultra-right group near Athens early on Tuesday, Dec 4, causing damage but no casualties, Reuters reported citing a police source.

The explosion occurred at the local offices of the Golden Dawn party in the Athens suburb of Aspropyrgos. "It was a powerful blast that caused a lot of damage," said a police official who declined to be named.

Riding a wave of public anger at austerity, corrupt politicians and illegal immigration, Golden Dawn has come out of nowhere to become Greece's third-biggest party, according to the latest opinion polls.