Two men are being hunted over the murder of another man during a vicious row on a housing estate.
The victim, Stephen Hanaphy, 20, was thought to be one of four men from Coolock, in Dublin, involved in a row with two other men in Ardee, Co Louth on Friday night.
Detectives believe a gang travelled to a house at Sliabh Breagh in the town, where they smashed in back windows and forced their way in at around 11pm.
A number of shots were fired at the intruders, from either a handgun or rifle, and the four men fled the scene in different directions.
It is believed Mr Hanaphy, who was hit by a single shot above the heart, collapsed and died under a tree on a green area about 300 metres from the house. His body was discovered shortly after 4am.
Another man presented himself to Beaumont Hospital in Dublin this morning with a gunshot wound to his arm.
It is understood his injuries are not life threatening. Detectives are interviewing him about the incident.
They are also looking to speak to two settled Travellers who are believed to have fled the house. The scene was sealed off for technical examination by Garda forensic experts.
Deputy state pathologist Dr Kahlid Jabbar carried out a preliminary post mortem examination before the body was taken to Dublin for a full autopsy.
Detectives said they were investigating all the circumstances surrounding the incident. They were carrying out door to door inquiries on the housing estate. They also appealed for anyone who was in the area from 10pm on Friday or anyone with information to contact them.