Gardaí investigating the murder of two men in Dublin's gangland feud are continuting to question three men.
Darren Geoghegan (26), from Drimnagh in Dublin and Gavin Byrne (30), from Crumlin, were shot last November while they waited in a car in a Firhouse housing estate.
In a cross-Border operation, gardaí arrested three men in Dublin while the Police Service of Northern Ireland also made a number of arrests.
A Garda spokesman said two of the men were being detained in Tallaght Garda station under Section 30 of the Offences Against the State Act while another was being held in Rathfarnham Garda Station. They are aged 28, 35 and 38.
The spokesman said the gardaí and the PSNI had carried out a large number of searches under the Mutual Assistance Programme.
The murder of Geoghegan and Byrne was believed to have promoted a revenge attack that saw Noel Roche (27) shot dead in a car outside the Yacht Pub in Clontarf.
His brother John had been killed last March in Kilmainham as part of the long-running feud between the two Dublin-based criminal gangs.