Two men have been questioned in connection with the murder of Shane Geoghegan in Limerick last November.
They were released without charge yesterday evening and a file is being prepared for the Director of Public Prosecutions.
Shane Geoghegan, 28, was shot dead on his way home after he had visited friends to watch the Ireland-Canada rugby match.
Gardaí believe Mr Geoghegan may have been the victim of mistaken identity.
The men, aged 57 and 28, were arrested yesterday morning in the Limerick area and in Dublin.
They were questioned at Roxboro Road and Clondalkin garda stations.