Police arrested five individuals in connection with clashes at the Lavrio indoor gymnasium during a basketball game on Sunday evening.
The altercation occurred between fans of Lavrio and Marousi during a league match, shortly before the end of the game.
According to the police, two police officers and a game official were injured. Eight people were initially detained.
During the preliminary investigation, five of those detained were confirmed to have participated in the clashes, including two individuals responsible for injuring the police officers.
The arrested individuals were formally charged and brought before the prosecutor.