A second young man has been arrested in connection with the murder of a 45-year-old man who was stabbed to death in Tallaght on Monday night.
Ionel Nicolae Diaconu died following a row at a house in Castle Park, where a number of people were at the time.
A teenager was arrested at the scene and a second young man was arrested yesterday.
Both are being detained at garda stations in Dublin.
Gardaí and the emergency services were called to the scene just after 9pm on Monday where they discovered Mr Diaconu with fatal injuries inside the house he was living in.
His body was removed from the house yesterday morning and a forensic examination of the scene was carried out.
Gardaí removed evidential material including the weapon used.
State Pathologist Dr Linda Mulligan completed a post mortem yesterday evening.
Local people said Mr Diaconu only moved to Castle Park in recent months and was living with an Irish woman and four children.
Gardaí have begun a murder investigation and established an incident room at Tallaght Garda Station.
A senior investigating officer and a family liaison officer have also been appointed.
Detectives say they are following a definite line of inquiry and issued an appeal for anyone with information to contact them.
