A fifth person has been arrested as part of the investigation into the murder of Vincent Ryan in Dublin last month.
A woman in her early 20s was arrested this evening and is being detained at Finglas garda station.
There are currently two men in custody while two others have been released as part of the investigation.
Mr Ryan died after he was shot several times while sitting in his car on McKee Road in Finglas on 29 February.
The 25-year-old was well known to gardaí for his involvement in dissident republican activity.
Gardaí have again appealed for anyone with information to contact Finglas Garda Station on 01-6667500, the Garda Confidential Line on 1800-666-111 or any garda station.
