A 29-year-old man, Michalis Katsouris, died after a brawl between hardline supporters of AEK Athens and Croatian club Dinamo Zagreb on Monday. In light of the tragedy Tuesday's third round qualifier between the two sides was subsequently postponed until August 19 by UEFA.
Police made around 100 arrests - the majority said to be linked to Dinamo's 'Bad Blue Boys' ultras, according to a judicial source. Three judges are conducting the interviews which are expected to be completed on Sunday night.
Greek Prime Minister Kyriakos Mitsotakis and UEFA president Aleksander Ceferin "spoke on the matter by telephone" on Friday, an official statement announced. The pair will meet in Athens next Wednesday to discuss "what is happening in Greek and European football", the statement added.
Ceferin, Mitsotakis and other government ministers will then hold a meeting with the owners of Greece's four big clubs - Olympiakos, Panathinaikos, AEK and PAOK.