A football match-fixing scandal has widened with Italian police investigating several major clubs, including AC Milan, Juventus, Lazio and Fiorentina.

Magistrates in Naples said 41 people, including Serie-A directors, the Italian Football Federation, and officials with several clubs would be called in for questioning.

The former head of the Italian Football Federation, along with the Juventus general director and other officials will answer questions later this month. Police raided the house of Franco Carraro, who quit as federation president this week, and the federation offices in Rome.

The scandal involves the possible collusion in the appointment of match referees for Serie-A competition. Investigators suspect as many as 19 first-division matches were affected last year.

This is not the first scandal to hit Italian football. In 1980, several team officers and players were arrested for match fixing. AC Milan and Lazio were both relegated from Serie-A for their part in the scandal.

In 1986 several teams had points deducted because of match-fixing. Six years ago, several players were arrested for the same offense, while in 2004 the club Modena lost points and several players were banned for fixing matches.