A bomb exploded outside the local office of the neofascist Golden Dawn party in the Greek industrial town of Aspropyrgos early today morning.
No-one was injured in the pre-dawn attack but it caused significant damage to the shop on the ground floor and the first-floor offices.
The home-made device also blew out windows of nearby shops.
Golden Dawn advocates expelling all immigrants from Greece and won 18 seats in the 300-member parliament in recent elections.
It has been accused of a wave of violent attacks against immigrants and pressing local businesses to fire foreign workers.
Stories abound of its activists demanding lists of foreign children who attend day-care centres or nursery schools.
It has been alleged that Golden Dawn has also been infiltrating the Greek police.
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