Two men remain in custody arrested in connection with the murder of leading gangland figure Eamon Dunne.
The two men were arrested in Dublin yesterday morning.
Both are well known to gardaí and one is serving a prison sentence for killing a man in a drug-related dispute.
That man, who is in his 20s, was taken from his prison cell yesterday morning and brought to Mountjoy Garda station for questioning.
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The other man, who is also in his 20s, was arrested at a house in north Dublin and is being questioned at Whitehall Garda station.
Both were detained under section 30 of the Offences Against the State Act.
They can be held for up to 72 hours without charge.
