Two men who were arrested yesterday in connection with the death of Martin Brophy have been released without charge.
A file has been prepared for the DPP.
The body of 22-year-old Martin Brophy was found in a vacant building in Waterford City last Monday.
A post mortem revealed he died following a serious assault.
He was last seen on Saturday afternoon in the Poleberry area of the city.
Gardaí in Waterford are appealing for anyone with information to come forward.