A man is being questioned in Bray Garda station this morning in connection with the murder of Paul 'Frank' Byrne.
Mr Byrne went missing from his Tallaght home in 2009 and his remains were discovered near Blessington in Co Wicklow one year later.
A 22-year-old was arrested in relation to the investigation yesterday morning in Baltinglass.
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He is being held at Bray Garda station under Section 4 of the Criminal Justice Act.