Gardai have arrested a teenager in connection with a fatal stabbing in Tallaght just over a year ago.
17 year old Reece Cullen died after being attacked at a house in Kilclare Crescent on January 5th 2017.
Gardai arrested a juvenile in the Tallaght area at around 7 am this morning.
It's the 4th arrest as part of this investigation.
Two women and a teenage boy have previously been questioned in connection with his death.