A man in his 40s has been arrested in connection with the murder investigation of Kenneth Fetherston.
Gardaí searched a home in the midlands before arresting the man on suspicion of murder.
The man is currently being detained in a Garda station in the east region.
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26-year-old father of one Mr Fetherston disappeared from Tallaght in September 2009.
His remains were found in Rathfarnham in January 2010, upgrading the investigation to a murder inquiry.
No one was charged with the murder, but a cold case inquiry was opened in 2020.