Another man has been arrested in connection with an attack in Blanchardstown in Dublin on Christmas Eve.
It is the seventh arrest in the investigation into the incident which led to the deaths of two men.
Tristan Sherry died following the attack in the restaurant, while Jason Hennessy Senior died 11 days later.
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The man arrested this morning is being held under Section 4 of the Criminal Justice Act at a Garda station in Dublin.
He can be questioned for up to 24 hours.