It is understood the threat was issued on a social media platform last week and is believed to have contained a sinister threat on Mr Harris and his young family
The man, aged in his 40s, was arrested on Sunday morning and was brought to a Garda station in the north-west region for questioning.
READ MORE: Lanzarote issues rare 'black alert', with Irish tourists warned about travel to holiday hotspot “The male in his 40s is currently detained under Section 4 Criminal Justice Act, 1984 at a Garda Station in the Garda North Western Region. An Garda Síochána is not providing any further information at this time.”
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