Italian newspapers have carried transcripts of phone calls in which PM Silvio Berlusconi allegedly boasts that 11 women were queuing up outside his room to have sex with him.

The intercepted conversation was with local businessman Giampolo Tarantini, who prosecutors allege was running a high-level prostitution ring.

Eight people are charged with supplying prostitutes for Mr Berlusconi.

He has not been charged and says he was unaware of their activities.

However, judges want to interview him as a witness over allegations that Mr Tarantini attempted to extort money from him in return for silence over the prostitution allegations.