Update 9.45pm: Gardaí have said they have now identified a man shot in Dublin's inner city this afternoon.
It is believed the victim was not the intended target in the lunchtime shooting at the junction of Sheriff and Oriel Street.
The man in his 20's was shot up to six times.
Gardaí have said the victim's family has asked for privacy.
Superintendent Kevin Gralton at Store Street Garda station made the following appeal this evening.
“I would ask that anybody that witnessed this shooting today to call us,’ said Superintendent Kevin Gralton.
“I would also ask that anybody that saw a male on a black pedal cycle on Sheriff Street Lower at approximately 12.25pm today, and who abandoned the pedal cycle on Sheriff Street lower at the junction of Seville Place and Guild Street and then left on foot to make contact with us here at Store St on 01 6668000, the Garda Confidential Line on 1800 666 111 or any Garda station.”
Update 6.10pm: Gardaí in Store Street have said that the identity of the man shot dead in Dublin this afternoon is unknown.
They are appealing for witnesses, in particular anyone who may have seen a man of strong build and dressed in dark clothing who was seen leaving the area on a bicycle in the direction of Seville Place and the Guild St junction with Sheriff Street.
They say he abandoned the bicycle at the end of Sheriff Street and was last seen leaving Sheriff Street Lower on foot.
Superintendent Kevin Gralton said: "I would ask that anybody that witnessed this shooting today to call us.
"I would also ask that anybody that saw a male on a black pedal cycle on Sheriff Street Lower at approximately 12.25pm today, and who abandoned the pedal cycle on Sheriff Street lower at the junction of Seville Place and Guild Street and then left on foot to make contact with us here at Store St on 01 6668000, the Garda Confidential Line on 1800 666 111 or any Garda station."
Earlier: A man in his 20s has died following a shooting in Dublin’s inner city.
It is being reported that it happened outside Noctor's pub on Sheriff St at around 12.30pm.
It is also understood that six shots were fired at the man, who it is said was not the intended victim.
The man who was injured in the shooting was taken by ambulance in a serious condition to the Mater Hospital, where he later died.
Locals said the man was not from the area, and Gardaí have sealed off the scene and deployed a helicopter.
Locals say it happened very close to a school and crèche.
One said: "It makes you afraid to send the kids to school, because an hour later my daughter would have been walking right down where it happened to go to school."
Another local said: "It is a disgrace, for it to happen when all them children are coming home from school."
The gun attack took place about a mile from where taxi driver Eddie Hutch was shot dead at his home off North Strand in February.
The area of Dublin's north inner city has been home to members of the extended Hutch family for a long time, some of whom have recently become embroiled in an increasingly vicious gangland war with the Kinahans.
The feud has been blamed for a number of gun murders, including one in Spain, two in Dublin and one in Ratoath, Co Meath.
Armed Garda patrols and checkpoints were posted to the Sheriff Street area after the bloody fallout deepened in February with a gun attack at a boxing weigh-in at the Regency Hotel in the north of the city.
Before that the area was for years patrolled by armed officers attempting to keep apart two factions of another gang that split.
Sheriff Street is in the shadow of the IFSC, home to big international banks and the location for massive redevelopment over the last 20 years.
The Hutch-Kinahan feud spiralled into a killing spree when Gary Hutch was shot dead in an apartment complex near Marbella on the Costa del Sol last September.
His killing is believed to have been avenged in the Regency attack which claimed the life of David Byrne, an associate of the Spain-based Kinahan family.
Within days Eddie Hutch was dead and at the end of last month Noel Duggan, an old friend of suspected armed robber Gerry "The Monk" Hutch, was shot dead at his home in Ratoath.