A high-profile private detective who worked for the News of the World and was jailed in 2007 for hacking phones of the royal family was on Wednesday arrested as part of the ongoing investigation into the hacking scandal.

Glenn Mulcaire was arrested on suspicion of conspiracy to hack voicemail messages and perverting the course of justice. He was taken to a south London police station for questioning.

Mr. Mulcaire is the 20th person to be arrested in connection with the investigations. Others include Rebekah Brooks former NoW Editor and chief executive of Rupert Murdoch's British media group News International; and Andy Coulson , Prime Minister David Cameron's former communications chief and one-time NoW Editor. Both are on bail.

Mr. Mulcaire, who was jailed for six months in January 2007 after admitting intercepting voicemails of royal family members, including Prince William, was also convicted of hacking messages of a number of other public figures and celebrities. They included the Liberal Democrat MP Simon Hughes and the model, Elle MacPherson.

In a statement in July, he apologised to those “hurt and affected” by his actions but said having been employed by NoW he had “acted on the instructions of others”.

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