Gardaí are also investigating two serious assaults in the city on Saturday night, one of which left a teenager with severe head injuries.
Detectives were yesterday questioning three teenagers in relation to that assault.
The fatal stabbing of a man from Latvia late on Friday night brings to 61 the number of violent deaths in the country so far this year, nine more than in 2001.
At least 33 of those deaths were in Dublin, including 15 fatal stabbings, 12 fatal beatings and six shootings.
A 33-year-old non-national will be brought before Dublin District Court this morning in relation to the fatal stabbing of the Latvian man.
The victim, aged 25, was found along with another man at a flat on Seville Place, in Dublin’s north inner city, just before midnight on Friday.
The ambulance control centre received a call saying that two men had received stab wounds in the flat at the address.
The two men were brought to the Mater Hospital, but the Latvian died shortly after arrival.
The victim has been identified by gardaí, but has not been named as all relatives in Latvia have yet to be informed.
It is the second fatal stabbing in the north inner city in little more than two weeks.
Patrick Farrell, 38, was stabbed and kicked to death by another man after intervening in a row between his attacker and that man’s girlfriend.
Detectives were also questioning three teenagers yesterday in relation to a serious assault on a 16-year-old in the Loughlinstown area of south Dublin.
The victim suffered head injuries in the attack, which happened just after midnight on the Glenthorn Estate.
Gardaí in Shankill Station arrested one youth after the incident and two others yesterday.
Shortly after that attack, another man was seriously assaulted closer to the city centre, in Walkinstown. The victim suffered serious head injuries in the attack which happened at Cromwellsfort Road at 2.30am.