Thames Valley Police are reportedly planning to travel to the United States to interview members of Virginia Giuffre's family as part of their investigation into former Prince Andrew.
According to The Times of London, investigators will have an informal conversation with Giuffre's brother, Sky Roberts, and his wife, Amanda Roberts.
The couple are not considered direct witnesses, so they will not be formally interviewed.
Andrew has been under scrutiny by Thames Valley Police over allegations of sexual offenses linked to the Jeffrey Epstein case.
Giuffre, one of Epstein's most prominent victims, alleged she had sex with Andrew on at least three occasions starting when she was 17.
Andrew has never been criminally charged.
Giuffre died by suicide last year.
The Times reports that Giuffre's family described the police as "very proactive" in their investigation.
Authorities are also gathering case files and seeking to speak with Andrew's security team.
Andrew was stripped of his royal titles by King Charles after his association with Epstein became public.
