The Greek government has announced top-flight football matches will be played behind closed doors until February 12 after a police officer was injured in clashes between rival fans.
Action was taken after a police officer suffered a severed artery in their thigh in violence during a volleyball match in Athens last week.
The match was between rivals Olympiacos and Panathinaikos, with both teams owned by football clubs carrying the same name.
Pavlos Marinakis, a Government spokesperson, announced after a meeting chaired by Prime Minister Kyriakos Mitsotakis that all top flight football matches will be held behind closed door for two months.
Marinakis said action was the latest steps taken by the government in its attempts to curb extreme fan violence.
Marinakis told a press briefing as cited by Sports Central: 'The murderous attack on the police officer is not the first incident of extreme fan violence. 'For many years now, criminals in the cloak of the fan have been committing serious crimes, seriously injuring and killing. 'We know and completely understand the anger of society, of all sane citizens, in front of images that do not refer to sports. 'From the first moment, the Government has made it clear that it will exhaust its actions and interventions to deal with a chronic problem. And in fact we have made it clear that our interventions will be dynamic, meaning they will be constantly reviewed based on their results.
He added: 'While we have given time and space for everyone to comply with our decisions, unfortunately it has proven that further interventions that are even more drastic, but absolutely fair and necessary, are required. 'Neither athletes, nor fans should they suffer from the murderous behaviour of criminal gangs and the pathetic tolerance of a tiny minority of fans.'
The Athens News Agency reported that the 18-year-old who was arrested for injuring the police officer has confessed at the public prosecutor's office on Monday.
Over 400 people were detained briefly by police after last week's violence.
Marinakis has said the decision could also apply to European home matches, with clubs ordered to install cameras and systems of electronic identification for fans at the stadiums.
The order will lead to Olympiakos having to play Serbian side Backa Topola behind closed doors in their final Europa League group stage match on Thursday.
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