The Metropolitan Police said it is "actively" looking into media reports that Prince Andrew tried to obtain personal information about his accuser Virginia Giuffre through his police protection.
"We are aware of media reporting and are actively looking into the claims made," the force said on Sunday.
It comes after Ms Giuffre's brother called on King Charles III to strip Andrew of his "prince" title, following the announcement he would stop using his other titles.
Prince Andrew has not commented on the reports, but consistently denies all allegations against him. Buckingham Palace has been contacted for comment.
Ms Giuffre, who took her own life earlier this year, said she was among the girls and young women sexually exploited by convicted sex offender Jeffrey Epstein and his wealthy circle.
