Gardaí have named the victim of last night's fatal shooting as Anthony Russell from Cromcastle Drive, Kilmore, in Dublin.
The 30-year-old was out having a drink in the Ardlea Inn on Maryfield Avenue in Artane when the incident occurred.
He was shot a number of times in the upper body after being singled out by two gunmen.
The incident happened shortly before 8.30pm and Mr Russell died in hospital at around 10pm.
Gardaí say both gunmen were over 6'0'' tall and wore dark clothing and balaclavas.
One was wearing a waist-length jacket with a white symbol on the left hand side, the other was wearing white runners.
A handgun was used in the attack and the gunmen made their getaway in a silver coloured Nissan Almera car.
Gardaí have collected CCTV images from the vicinity and have also interviewed customers who were in the pub at the time.
Gardaí believe the shooting is linked to a feud between criminal gangs in Dublin's north inner city.
The victim had more than 24 convictions, including some for drug dealing. He had also survived a previous gun attack on his life two years ago.
Charles Flanagan, Fine Gael's Justice Spokesman, said the attack showed the need for better surveillance of criminals and those suspected of involvement in gangland violence.
Minister Sean Haughey, TD for the Dublin North Central Constituency, said the garda crackdown on crime was a constant battle and one which the public should support.