A man in his early 20s from the North has been arrested at Dublin Port as part of the investigation into the discovery of bodies in a lorry in Essex.
The arrest was made on foot of an outstanding court order for an offence in this jurisdiction.
He will appear before the Criminal Courts of Justice this afternoon.
Police in Britain say they're keeping an open mind, after reports suggested 39 deaths in a lorry container in Essex are part of a wider trafficking conspiracy.
Vietnamese relatives of suspected victims have posted concerns on social media, saying the lorry, found in Tilbury on Wednesday, was among three to cross Europe.
It's believed more than 100 migrants were being brought across Europe to the UK.
The 25 year old driver of the truck has been held since the discovery of the bodies.
The others arrests, made yesterday (Friday), include a 38 year old couple in Warrington in Cheshire who are said to be from Ireland and a 48 year old man from Northern Ireland. He was arrested at Stansted Airport in Essex.
All the bodies have been recovered for post-mortem tests.
Detective chief inspector Martin Passmore has updated reporters this afternoon.
