Andrew Mountbatten-Windsor, the brother of the UK's King Charles III, has been arrested on suspicion of misconduct in public office, according to reports.

The police force did not name Mountbatten-Windsor, as is normal under U.K. law. But when asked if he had been arrested, the force pointed to a statement saying that they had arrested a man in his 60s. 

Mountbatten-Windsor is 66-years-old. His birthday is today.

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The Thames Valley Police, without naming who it was referring to, issued a statement noting that "we have today (19/2) arrested a man in his sixties from Norfolk on suspicion of misconduct in public office and are carrying out searches at addresses in Berkshire and Norfolk."

"The man remains in police custody at this time. We will not be naming the arrested man, as per national guidance," the police noted.

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"Following a thorough assessment, we have now opened an investigation into this allegation of misconduct in public office," Assistant Chief Constable Oliver Wright noted. 

"It is important that we protect the integrity and objectivity of our investigation as we work with our partners to investigate this alleged offence. We understand the significant public interest in this case, and we will provide updates at the appropriate time," he added.

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Mountbatten-Windsor has faced public scrutiny due to his ties to the late Jeffrey Epstein. Virginia Giuffre alleged he had sex with her when she was only 17, and he knew her age. 

Giuffre's family said in a statement, "At last. Today, our broken hearts have been lifted at the news that no one is above the law, not even royalty. On behalf of our sister, Virginia Roberts Giuffre, we extend our gratitude to the UK’s Thames Valley Police for their investigation and arrest of Andrew Mountbatten-Windsor. He was never a prince. For survivors everywhere, Virginia did this for you."

This is a breaking news story and will be updated

The Associated Press contributed to this report