Gardaí are anxious to speak to anyone who was in the Hampton Square area this morning.
It's following the discovery of the body of a man in his home in Hampton Square, Navan Road, Dublin 7 at approximately 9.30am.
Gardaí are investigating all of the circumstances surrounding the discovery.
The man's body was taken to the Mater Hospital - a post mortem will take place tomorrow which will determine the course of the investigation.
Gardaí wish to speak to anyone who was in the area this morning between the hours of 7am and 9.40am and who may have seen anything suspicious.
Anyone who has information in relation to this incident to contact Blanchardstown Garda Station on 01-666 7008, the Garda Confidential Line 1 800 666 111 or any Garda Station.
Investigations are ongoing.