Soccer: AC Milan's Boateng testifies over racist chants
Prosecutors probing 'incitement of racial hatred'01 February, 14:10
The match at Busto Arsizio north of Milan was first interrupted and then scrapped altogether after Milan captain Massimo Ambrosini led his teammates off the pitch.
Milan's Ghanian midfielder Boateng kicked the ball towards fans who were directing abuse at him before the action stopped.
M'Baye Niang, Urby Emanuelson who has just joined London side Fulham, and Sulley Muntari were also targeted.
Italian football has been battling racism in the stands for a number of years after several shameful high-profile incidents.
The head of the Italian soccer federation (FIGC), Giancarlo Abete, voiced solidarity with the players and club, calling the incident "an indecent ruckus that offends the whole of the soccer world".
Milan captain Massimo Ambrosini testified on Monday.
Prosecutors are taking testimonies for investigations into incitement of racial hatred and personal injury against the AC Milan players.