[4] The Hellenic Police received a call at 23:57 the same night, in which the caller stated that a group of 50 people had assembled and were armed with bats, at the intersection of Kefallinias Street and Panagi Tsaldari Avenue in Keratsini.

[6][7][8] Roupakias called the central office of Golden Dawn and spoke with Nikolaos Michaloliakos while the latter was at his residence at the time; this was later confirmed by police.

[citation needed] The murder was condemned by all parties represented in parliament,[13] including Golden Dawn, which claimed through its MP, Ilias Kasidiaris, that it had no connection to the incident.

"[15] In a television statement, Prime Minister Antonis Samaras asked for public calm and stated that he will stop "the descendants of the Nazis from poisoning our social life, to act criminally, to terrorize and to undermine the foundations of the country which gave birth to democracy".

[citation needed] The attack resulted in two members of Golden Dawn, Manolis Kapelonis and Giorgos Fountoulis, being killed with a third injured.

[24] In 2021, a scientific researcher of the Aristotle University of Thessaloniki, named two newly discovered genres of cyanobacteria, Speos fyssasii and Iphianassa zackieohae, after the murdered activists Pavlos Fyssas and Zak Kostopoulos respectively.

[25][26][27] "Έχω" – Ανδρείκελος – Οι Παλίρροιες Των Χρόνων (The Tides Of Time) (2007)[28][29] "Σιγά μην κλάψω, σιγά μη φοβηθώ" (Won't cry, won't be scared) "Για το καλό μου" (For my wellbeing) "Ζόρια" (Stress)[30] "Εκτός Ελέγχου" (Out of Control/Anthem)[31]