Former Atalanta captain Cristiano Doni and 16 other people have been arrested across Italy in an ongoing investigation into soccer match-fixing and illegal betting, according to reports.

The ANSA news agency and the Gazzetta dello Sport say the inquiry is focused on several matches in Serie B over the past two seasons - with Atalanta involved in three matches.

Three Serie A matches from last season also are reportedly under investigation: Brescia vs. Bari, Brescia vs. Lecce and Napoli vs. Sampdoria.

Prosecutors in Cremona have scheduled a press conference to discuss the operation.

Others arrested reportedly include former Inter Milan and Roma player Luigi Sartor, former Serie B player Alessandro Zamperini and active players Carlo Gervasoni of Piacenza and Filippo Carobbio of Spezia.

Charges reportedly include criminal association and sporting fraud.

In June, 16 people were arrested as part of the inquiry, which is being led by prosecutors in Cremona, and Doni was then placed under investigation.

In August, Doni was banned from soccer for 3 1/2 years by the Italian federation's disciplinary committee and Atalanta - which was promoted to Serie A for this season - was given a six-point penalty.

Doni has maintained that he is innocent.