British police said that searches at Andrew Mountbatten-Windsor's former home in southeast England had concluded after the former prince was arrested last week on suspicion of misconduct in public office.
Mr Mountbatten-Windsor's arrest on Thursday was part of a police investigation into his ties with the late US sex offender Jeffrey Epstein.
"Officers have now left the location we have been searching in Berkshire. This concludes the search activity that commenced following our arrest of a man in his sixties from Norfolk on Thursday," Thames Valley Police's Assistant Chief Constable Oliver Wright said in a statement last night.
Documents in the Epstein files released by the US Justice Department last month appeared to show that Mr Mountbatten-Windsor had sent confidential government documents to the disgraced financier while working as a trade envoy.
Mr Mountbatten-Windsor has always denied any wrongdoing in relation to Epstein, and said he regretted their friendship.
Separately, London's police said that they were contacting former protection officers who worked for the former prince, urging anyone with allegations of sex offences relating to Epstein to come forward.
Additional reporting PA