Andrew Mountbatten-Windsor, the King's brother, has been arrested on suspicion of misconduct in public office, according to Thames Valley Police.
The arrest occurred on Thursday morning at the King's Sandringham Estate in Norfolk, where Mountbatten-Windsor has been staying. Vehicles believed to be police cars were seen arriving at the estate.
Assistant Chief Constable Oliver Wright stated, "It is important that we protect the integrity and objectivity of our investigation as we work with our partners to investigate this alleged offence."
Police Response
Thames Valley Police said they would not be naming the arrested man "as per national guidance". The force is carrying out searches at addresses in Berkshire and Norfolk.
Unmarked police vehicles were seen arriving at the Sandringham Estate in Norfolk before Mountbatten-Windsor's arrest. Uniformed police officers were also seen close to the Royal Lodge in Windsor Great Park.
Investigation Underway
Dal Babu, a former Metropolitan Police Chief Superintendent, told BBC News that by arresting Mountbatten-Windsor, officers will be able to access computer equipment, files, and other evidence.
The King has stated, "I have learned with the deepest concern the news about Andrew Mountbatten-Windsor and suspicion of misconduct in public office. The law must take its course."
Legal Context
Misconduct in public office is a complicated offence, according to BBC News home and legal correspondent Dominic Casciani. It essentially boils down to an allegation that someone did something seriously wrong, knowing it to be wrong, while performing their public duties.

