The murder of a father-of-four may be linked to a dissident republican feud, detectives believe.
Liam Kenny, 53, was gunned down in the hallway of his west Dublin home after at least two gunmen failed to break in and opened fire through the front door.
Detectives immediately opened two lines of inquiry - one that the dead man, who had links to the Continuity IRA, was gunned down by Real IRA members, and the other that he was targeted by drugs gangs.
Mr Kenny was shot several times at about 4am on Thursday at his home on Shancastle Avenue, Clondalkin while several members of his family were inside.
The gunmen are believed to have fled the scene in a silver Nissan Qashqai found burnt out a few kilometres away. It was stolen in Dublin several days ago. The 10-D registered car was recovered in The Steeples area, Chapelizod, close to Ballyfermot and underwent forensic tests.
Superintendent John Gilligan said: "This car is important in terms of the investigation and we believe that it was used as a getaway car."
The dissident republican link being investigated is whether Mr Kenny had ties to the Continuity IRA - the military wing of Republican Sinn Fein. He was a member of Republican Sinn Fein until July last year and left when a splinter group was formed, mainly by members based in Limerick.
Detectives were looking into whether he was targeted because he crossed swords with members of the Real IRA or if there are links to a wider turf war over protection rackets.
The Real IRA has been involved in a bitter feud in Dublin over security firms manning doors of pubs and nightclubs. There has been at least one murder and several gun attacks linked to it.
The second line of inquiry centred on whether local drugs bosses ordered the attack because dissident groups were interfering with their dealing.