Speaking on Saturday, Mr Berlusconi said: "It's always a pity when a young person dies. I never met this person, never talked to her.
"What I read of her statements made me think that everything was invented, absurd," he said.
Mr Berlusconi - who has served as prime minister in four governments - is still facing a number of charges, including bribery.
He denies the allegations....
Italy's Corriere della Sera newspaper reported that Milan's hospital had sent [Fadil's] samples to a specialist laboratory.
The results suggested the presence of a mix of radioactive substances, including cobalt.
This has not been confirmed by Italian prosecutors.
Italian media also report that Ms Fadil - a regular guest at Mr Berlusconi's sex parties - was writing a book about her experiences, and magistrates investigating her death have obtained a copy of the manuscript.
Mr Berlusconi's reputation was tarnished by allegations about the parties at his private villa.
https://www.bbc.com/news/world-europe-47595320