Gardaí are appealing for information following the death of 34-year-old David Boland from Nurney in Co Kildare.
Mr Boland died after being stabbed in the early hours of Thursday morning.
At approximately 5:30am, Gardaí were called to the scene of an incident on Duke Street in Athy, where a 34-year-old man was found with a number of apparent stab wounds.
He was treated at the scene and taken by ambulance to the Midland Regional Hospital, Portlaoise where he later died.
The State Pathologist and local Coroner have been notified.
A Garda family liaison officer has also been appointed to the case.
Members of the Garda Technical Bureau are assisting with the investigation.
An incident room has been set up in Athy Garda Station.
Speaking earlier, Superintendent Martin Walker said: "From our enquiries to date we understand a number of people were in the vicinity when this incident occurred and we would appeal to anyone who was in the Duke Street area at approximately 5:30am this morning to come forward.
"We would also appeal to passing motorists, and in particular those with dash cam footage, to contact us here at the incident room.
"A silver/grey Audi was driven from the scene following the incident to nearby Woodstock Street where it was set alight.
"Again we would appeal to anyone with information on the movements of this car to come forward."
The car was owned by the victim and was driven away from the scene.
Anyone with information is asked to contact Athy Garda Station on 059-8634-210 or the Garda Confidential Line at 1800-666-111.
With reporting from Jack Quann and Stephanie Rohan