GARDAI say they are following a definite line of inquiry after a man sustained serious injuries when he was assaulted near the city centre during the early hours of yesterday morning.
The victim - a man in his mid 40s - was attacked at around 3am near the junction of Gerard Street and South Circular Road.
It is understood he sustained serious facial and neck injuries and was taken to the Mid Western Regional Hospital for treatment following the incident.
His condition was described as serious but not life-threatening.
The scene of the attack was preserved and members of the divisional scenes of crime unit conducted detailed forensic examinations yesterday morning.
A blood-stained door of a nearby house was the only evidence of the attack this Wednesday afternoon.
Investigating gardai have not said what kind of weapon, if any, was used by the culprit.
CCTV footage from the area is being viewed as part of the investigation.
While no arrests have been made so far, detectives at Henry Street garda station have interviewed a man about the incident.
Any witnesses are asked to contact the gardai at (061) 212400.