Gary O'Brien was found with gunshot wounds
Gardaí in Dublin have launched a murder investigation after the death of a man at a house in the city on Sunday.
The incident occurred at a flat on North Circular Road, Dublin 7 at around 8.30pm.
Gardaí and emergency services attended the scene, where Gary O'Brien - who was 51 - suffered gunshot wounds.
Mr O'Brien - a father & grandfather who had limited mobility - was originally from Finglas.
He was pronounced dead at the scene. Forensic examinations are continuing.
Officers initially thought the man's injuries may have been self-inflicted but no weapon was found at the scene.
A man and woman - both in their 30s - were detained overnight in connection with the investigation.
They are being held at two city centre Garda Stations.
Anyone with information or who noticed anything suspicious in the area is being asked to contact the incident room on 01-666-8200 or any Garda station.