One man has died and another is recovering in hospital following a stabbing incident at a nightclub in Co Clare.
A third man (19) is being questioned at Shannon Garda station.
The incident happened at the Shannon Knights nightclub in Shannon town at about 2am on Sunday.
Two men, believed to be from Limerick, were stabbed during the incident, including a 23-year-old who died later in hospital. The 23-year-old has been named locally as Jamie Higgins.
The postmortem examination of Mr Higgins was completed on Sunday evening.
The second man, aged 22, is recovering in hospital from non-life threatening injuries. The 19-year-old was arrested soon afterwards and taken to Shannon Garda station, where he is being detained under the provisions of section 4 of the Criminal Justice Act, 1984.
Emergency services were quickly alerted after the altercation, including Shannon fire brigade, who were requested to attend and assist gardaí and National Ambulance Service paramedics.
On arrival, emergency crews found that two men inside the premises had suffered stab wounds. A Garda who had arrived at the scene quickly carried out cardio-pulmonary resuscitation on the more seriously injured man. Both men were also treated at the scene by paramedics and firefighters before they were rushed to University Hospital Limerick, where one was pronounced dead a short time later.
Firefighters drove the two ambulances to the hospital so that paramedics could treat the injured men. The scene was preserved and remained sealed off pending completion of the forensic examination on Sunday.
Gardaí in Shannon are investigating the circumstances of the incident and appealed for witnesses or anyone with any information to come forward.
They would in particular like to speak to anyone who was in the Shannon Knights Night Club on Saturday night or in the early hours of Sunday to contact them in Shannon on 061-365900, the Garda Confidential Line on 1800-666111 or any Garda station.