Latest: Gardaí have appealed for witnesses after a 28-year-old was fatally stabbed O'Connell Street in Dublin.
A man in his late 20s has been arrested in connection with the attack which occurred at around 1.40am this morning.
A garda who was on beat duty in the city centre observed the two men together and asked that they be monitored on CCTV in the area.
The men became embroiled in an altercation and an officer immediately responded.
On arrival, the victim had been stabbed and the garda and members of the public gave him first aid.
A description of the other man had been distributed and he was arrested by another garda who was on duty in the Marlborough Street area.
The victim was taken to the Mater Hospital with stab wounds but was pronounced dead shortly after.
He was removed to Dublin City Morgue in Whitehall where a post-mortem is expected to take place later today by State Pathologist Dr Margaret Bolster.
Gardai searching Findlater Place near O'Connell Street in Dublin. Photo: Niall Carson/PA
Superintendent Paul Costello, Store Street Garda Station, has asked for the public's assistance with their ongoing investigation.
He is appealing for people to come forward who were in the O’Connell Street, Cathal Brugha Street, Marlborough Street areas between 1am and 2am this morning.
Members of the public who may have taken mobile phone footage or have dashcam footage of the incident or in those streets at that time are asked to contact An Garda Síochána.
"An Garda Síochána are aware that this incident has caused significant disruption within Dublin City Centre this morning, and are working to minimize this disruption as quickly as possible, however An Garda Síochána is conscious that a full and thorough investigation into this Fatal incident must be carried out," he said.
Anyone with information should contact Store St Garda Station on 01 6668000 or the Garda Confidential line on 1800 666111.
O'Connell Street remains closed both ways while bus routes that serve O'Connell Street are being diverted via Gardiner Street.
Luas Green Line services are not running between the St Stephen's Green and Dominick stops. Customers have been told that Luas tickets are valid on Dublin Bus routes serving this line.
The Red Line is operating as normal.
The Garda Technical Bureau at the scene on O'Connell Street this morning. Photo: Leah Farrell/RollingNews.ie
Earlier: Man arrested in connection with fatal stabbing on Dublin's O'Connell Street
A man has been arrested in connection with the fatal stabbing of a man in Dublin.
Gardaí launched a murder investigation after the 28-year-old victim was killed on O'Connell Street in the early hours of this morning.
The man arrested today is in his late 20s and was taken in custody near the scene of the incident.
A large section of the street is closed today following the attack which occurred at around 1.40am.
The victim was taken to the Mater Hospital with stab wounds but was pronounced dead shortly after.
It is understood he walked for a distance after being attacked. The man's age is not yet known.
The street is closed in both directions from the junction with Cathal Brugha Street as far down as the junction with Henry Street.
Garda Forensic Collision Investigators are at the scene.
Traffic remains heavy approaching O’Connell St from the North Quays, while Marlborough Street has reopened.
Dublin Bus have advised that services cannot access O' Connell Street in both directions.
Northbound buses are using Westmorland Street to Eden Quay to Gardiner Street and Parnell Street to normal route.
Southbound buses are using Parnell Square East, Gardiner Street and back at the normal route in Dolier Street.
Luas Green Line services are not running between the St Stephen's Green and Dominick stops. Customers have been told that Luas tickets are valid on Dublin Bus routes serving this line.
The Red Line is operating as normal.
Gardaí are appealing for anyone with information or anyone who was on O'Connell Street in the early hours of this morning to contact them at Store St Garda station on 01 6668000, the Garda Confidential Line 1800 666 111 or any Garda Station.
