A man who was critically ill following a serious assault in Monasterevin, Co Kildare on Sunday has died.
The man, aged in his 20s, who was found unresponsive at the scene and taken to Tallaght University Hospital has since passed away. He was pronounced dead on Monday afternoon.
The Office of the State Pathologist has been notified and a postmortem will be conducted by Chief State Pathologist, Dr Linda Mulligan.
The results of the post-mortem will determine the course of the investigation.
Shortly after 12:30am on Sunday, Gardaí and Emergency Services attended at Dublin Street, Monasterevin following reports of an altercation involving a group of people at the entrance of a premises.
A second man, believed to be his father and aged in his 50s, was treated for serious injuries and has been transferred to Tallaght University Hospital where his condition remains serious.
Investigating gardaí are continuing to appeal for witnesses to this incident to contact them.
Any person who was in the vicinity of Dublin Street, Monasterevin between 12.15am and 12.45am on Sunday is asked to contact investigating gardaí.
Any road users who were in the area and who may have camera, including dash cam footage is asked to make this available to gardaí.
Anyone with information is asked to contact Kildare Garda Station on 045 527730 or the Garda Confidential Line 1800 666 111.