From http://news.ert.gr/en/6/18712.asp

Members of Greek nationalistic group Chrysi Avgi (Golden Dawn) invaded the offices of state channel ET3, on Stratou Avenue, Thessaloniki, on Saturday afternoon, aiming at protesting over the fact that the police banned them from staging a rally in front of the statue of Alexander the Great at 7:00pm. Police officers intervened, drove them away and arrested 48 people. No damages were recorded to the building.