The scene of the assault at Blackhorse Place has been cordoned off for forensic examination.
An investigation has been launched after a man has died following a serious assault in Dublin 7.
The incident is said to have occurred in the early hours of Sunday morning.
A man was found with serious injuries on a footpath at Blackhorse Place, and was taken to the Mater Hospital where he later died.
The scene has been cordoned off for forensic examination and a post-mortem examination will be carried out to determine the man's cause of death.
Gardaí said in a statement: "This investigation is being coordinated from an incident room at the Bridewell Garda Station under the direction of a senior investigating officer."
Gardaí are appealing for witnesses who were around the Blackhorse Place or Blackhorse Avenue between 02:00 and 03:30 local time on Sunday.
Anyone who may have video footage (including dash-cam footage) of the Dublin 7 area around that time are also asked to come forward.
Anyone with information about the assault is asked to contact the Bridewell Garda Station on 01 666 8200, the Garda Confidential Line on 1800 666 111, or any garda station.
Main image: Gardaí at a crime scene Leah Farrell / © RollingNews.ie