A man wanted by Essex Police in connection with the investigation into the deaths of 39 people in a lorry trailer has been arrested at Dublin Port.
Gardai said the man, who was in his early 20s and from Northern Ireland, was held over an unrelated outstanding court order and will appear in court on Saturday afternoon.
He is understood to be sought by Essex Police as part of their investigation into the deaths of eight women and 31 men found in the refrigerated trailer in an industrial park in Grays in the early hours of Wednesday.
Four other people arrested over the deaths remain in custody.
It comes after the Vietnamese ambassador to the UK met with detectives as they work to identify the bodies.
Essex Police initially believed the victims were Chinese nationals.
Detective Chief Inspector Martin Pasmore told reporters on Saturday the nationality of the victims was not yet known, but the focus was now on the Vietnamese community - although "there may be other nationalities involved".
DCI Pasmore said there were "very, very few" identity documents recovered and that police would share fingerprints with Vietnamese authorities in an attempt to identify the bodies.
Commenting on reports that the lorry could have been part of a convoy of three carrying around 100 people, Mr Pasmore said investigators remained "open minded".
"There are lines of inquiry that are set of course to establish whether or not there are wider conspiracies involved in this and the lines of inquiry are set to identify the wider conspiracy but I can say no more than that," he said.
All of the bodies have now been moved from the truck in Tilbury Docks to Broomfield Hospital in Chelmsford, for post-mortem examinations to be carried out.
