Two more people have been arrested in connection with the fatal shooting of Keith Walker.
Three people are now in custody in relation to the shooting in west Dublin on Friday.
Gardaí say two men - aged 36 and 38 - were arrested yesterday evening in Dublin.
As part of the investigation, gardaí also searched a number of residential properties in the Dublin area.
The two men are being detained under section 50 of the Criminal Justice Act at Finglas and Blanchardstown Garda stations.
A third man who was arrested in County Meath yesterday is also still being questioned.
36-year-old Keith Walker, who was from Tir Na Rí Road in Clondalkin, was gunned down at a youth centre on Shelerin Road in Clonsilla on Friday - in what is believed to have been a case of mistaken identity.
He was shot up to eight times, while another man received gunshot wounds to his arm.
