A trial has opened for the accused ringleader and dozens of football officials and players charged with fixing Polish league games.

Prosecutors in Wroclaw were reading on Wednesday some 500 pages of indictments against Ryszard F. and 38 others, who are charged with organizing and participating in a criminal ring that offered money to referees, observers and players to fix games from 2003 to 2006.

It is another in a string of trials resulting from a probe that opened in 2005 and has led to the arrest or charges against some 600 people, including a former national coach and a national team player. Some have been given suspended prison terms and ordered to return the money.