Italian police descended on the national team's Euro 2012 training base Monday to speak to Zenit St Petersburg defender Domenico Criscito as part of a wide-ranging investigation into match fixing.

The 25-year-old, formerly of Genoa, was questioned by officials probing gambling markets linked to fixing results of matches in the Italian top flight.

A total of 19 people were arrested in the ongoing investigation by magistrates in Cremona, 11 of them players in Italy's top division.

Juventus coach Antonio Conte, who led the club to the Serie A title last season, was spoken to by police, as well as Lazio's captain Stefano Mauri.

As a result of the dawn raid on Italy's training camp near Florence, Criscito decided to withdraw from forthcoming Euro 2012 tournament in Poland and Ukraine.

Italian Football Federation (FIGC) vice-president Demetrio Albertini said Criscito was hugely disappointed to miss out but that he quit in order to protect the rest of the squad.

He said: "Criscito decided not to join Italy at the Euros. The tournament is no longer his priority, he wants to get in touch with the prosecutors as soon as possible to clear his position.

"We are with him, we believe in his innocence: until no evidence is proved, he should be considered innocent."

Prosecutors said the left-back was seen in a restaurant with match fixing suspects during his time at Genoa but the player has also protested his innocence.

Criscito's agent, Andrea D'Amico, said: "Criscito is calm but very surprised. He just joined a dinner with fans, a meeting asked by fans after the derby Genoa lost to Sampdoria in 2011.