The allegedly unpaid taxes refer to the period between 2011 and 2015, when Amazon made revenues of around 2.5 billion euros in Italy, the source said.

The tax police's findings have been handed to Milan prosecutors, the source added.

Amazon issued a statement denying it had evaded any taxes, and said its profits in Italy, on which taxes are paid, had been low due to its considerable investments in the country.

(Reporting by Sara Rossi; Writing by Gavin Jones; Editing by Giselda Vagnoni and Mark Potter)