A man has been arrested as he was about to board the ferry from Belfast to Liverpool as part of an investigation into a fatal stabbing in Dublin.
Two suspects in the murder of an asylum seeker in Dublin were detained this morning - one in Dublin and in Belfast.
The PSNI arrested one of the men in Belfast as he was about to board a ferry to Liverpool, it is understood - while gardai in the capital arrested the second man. The man arrested in the Republic is now being questioned at Pearse Street Garda Station.
The PSNI are assisting gardai in the operation after they carried out the arrest having received information from them.
Gardai feared the man arrested in Northern Ireland was attempting to flee the jurisdiction following the brutal knife killing of Nigerian native Quaham Babatunde, 34, on South Anne Street over the weekend.
Mr Babatunde - who was from Nigeria was stabbed by a masked man following a suspected row between two groups following an Afroswing gig in Twenty Two in the early hours of Saturday morning.
Another man who was also caught up in the terrifying 3am melee was taken to hospital for non life threatening stab injuries. A picture has since emerged of the victim - who was a resident of the Ballyogan IPAS accommodation centre.
In a message to residents of the Ballyogan IPAS accommodation centre, management said he was amongst the first IPAS residents who were accommodated there.
It said: "In light of this sad event, anyone who has been affected, IPAS has put in place support for both residents and staff to be able to get through this difficult time.
"Our sincere condolences go out to his friends and family and anyone who knew him in Ballyogan."
It comes as Justice Minister Jim O'Callaghan said the violence which occurred was "disgusting" and "unacceptable".
"The people involved need to know that they will be tracked down by An Garda Siochana and brought to justice," he said.
"I want the people that were involved to know that that type of violence is unacceptable in this city and this country and the people involved will be brought to justice," he said. Mr O'Callaghan said he has seen the "shocking footage" circulating on social media of the violent incident.
"I also want to put out that carrying knives and acts of violence on the street are not acceptable in Ireland, nor will they ever be acceptable," he said.
"You are not allowed to carry knives in Ireland," he said, adding that "we are not going to allow ourselves to develop into a society where young men are carrying knives".
The Fianna Fail TD said people were in a nightclub and "a row developed out onto the street" following which "the fatality and violence occurred".
"The people involved need to know that they'll be tracked down by An Garda Siochana and brought to justice," he said, adding gardai have "excellent" CCTV footage of the incident.
"That type of violence is unacceptable in this city and in this country and the people involved in this will be brought to justice," he added.
Gardai said they responded to a "serious public order" incident on South Anne Street around 3am on Saturday.
A murder investigation has since been launched - and officers are understood to be combing through CCTV footage and making door to door enquiries.
Shocking social media videos have also emerged of the incident - showing a masked man with a knife lunging at people in the street.