Two men have been re-arrested by gardaí this morning as part of an investigation into the death of Vincent Parsons.
The 34-year-old from Clondalkin died on the evening of August 24.
He has been discovered in the Killenarden estate in Tallaght with serious head injuries two days earlier.
Gardaí believe he was attacked during an incident in and around a nearby pub where he had been socialising.
The two men re-arrested today on suspicion of murder are both in their 20s.
They had initially been arrested in the days after the incident and then released.
They are currently being detained at Tallaght Garda Station under Section 4 of the Criminal Justice Act 1984.
Gardaí say that investigations are ongoing.