The garda technical team is examining a house in Portarlington where the body of a 26-year-old man was discovered yesterday evening.
The house on Spa Street remains sealed off as the forensic examination takes place.
It is understood that the victim had been watching the Winter Olympics, drinking with friends, when the Latvian man was stabbed.
Dr Margaret Bolster carried out a preliminary post mortem examination this morning.
The man's body has been removed from the scene.
Two men are being questioned at Portlaoise Garda Station.