A man in his 20s has been arrested by gardaí investigating the murder of Stefan Nivelles Posschier in Co Westmeath.
The man was arrested on Monday on suspicion of murder.
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He is currently being detains at Mullingar Garda Station under section 4 of the Criminal Justice Act 1984, gardaí said.
Last month, Mr Posschier (65) was found dead at a house in Rattin, near Kinnegad, on Tuesday evening.
Gardaí said he was violently assaulted and died as a result of his injuries.