Investigations continued yesterday into the weekend murder of a man at Dunmurry, near Belfast, which is believed to be drug-related.
Mr Edmund McCoy (28) was gunned down in a bar on Sunday night.
Two heavily disguised men, one wearing a wig and false moustache, entered the Motte'n'Bailey bar at around 7 p.m., singled out Mr McCoy and shot him twice in the stomach and once in the head.
He was taken to the Royal Victoria Hospital in Belfast but died there yesterday morning.
Security sources believe the killing to be drug-related. There were also claims the murder was carried out by the IRA, but the officer leading the murder inquiry would only say yesterday that the RUC was examining all angles.
Det Insp Geoff Smyth said Mr McCoy, who had a 10-year-old son, was known to the police but would not say on what basis.
Mr Hugh Lewsley, an independent councillor for the nationalist Twinbrook area in west Belfast, near where the killing took place, said he had no doubt the IRA was behind the attack.
He said that while he believed another group would claim the killing, this would be "just a cover name used by the IRA. It makes a mockery of republicans saying they are putting guns beyond use," he said.
Mr Vincent McKenna, director of the Northern Ireland Human Rights Bureau, also said the killing was the work of the IRA. He said Mr McCoy had known his name was on an IRA death list for at least 13 months as he allegedly had not paid protection money owed to the organisation.
The Ulster Unionist Party's security spokesman, Mr Ken Maginnis, condemned the killing and said "a drugs-related turf war seems imminent, and this latest killing seems to underpin that idea.
"This should remind those who clamour for the overnight implementation of the Patten report that, like it or not, a mafia culture is prevalent in Northern Ireland," he said.
Mr Maginnis said the RUC Chief Constable should let the killers' motives and identity be known. "It is vital that when people are being asked to make massive decisions, their elected representatives be kept informed," Mr Maginnis said.
He refused to be drawn into a "hypothetical" discussion about what should be done if the IRA was shown to have been responsible for the killing.
The DUP Assemblyman for Lagan Valley, Mr Edwin Poots, said it needed to be established whether republican paramilitaries were connected with the shooting.
"Whoever did this was acting as judge, jury and executioner. We do not know the full details of Mr McCoy's past but whatever he did was a far lesser crime than those who killed him," he said. The UUP went back into cabinet on the basis of an end to violence and if this was to be the work of the Provisional IRA, it would call that decision into question, he said.
The Sinn Fein MLA for West Belfast, Mr Alex Maskey, said: "There have been a number of shootings in the last few days. Two people are dead as a result. I do not know who is responsible and I am not going to speculate. We want to see an end all attacks like this. They are wrong."