"Violence at stadiums concerns society as a whole, " government spokesman Theodore Roussopoulos said. "All controlling bodies must act with determination and with the support of the state to wipe out this sad phenomenon."

Fans clashed in an Athens suburb ahead of a women's volleyball match between the country's biggest clubs Olympiakos and Panathinaikos on Thursday. One fan was stabbed and run over by a car, at least six people were injured, one of whom was in critical condition, and police made 13 arrests.