A man has been arrested amid an investigation into an aggravated burglary carried out by men pretending to be postmen.
The incident occurred at a house in Georgian Village, Castleknock, Dublin, last Friday morning, shortly after 11am.
Two men dressed as postal workers entered a house and produced a firearm before threatening the occupants.
One of the occupants managed to get out of the house during the incident.
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The two men then left the scene in possession of a safe and items of jewellery.
No injuries were reported, and investigations are continuing.
The man is currently being detained under Section 4 of the Criminal Justice Act, 1984 at Blanchardstown Garda station.