Gardaí are investigating after 14 people, including two children, were discovered in a vehicle which arrived at Rosslare Europort in south-east Ireland.
The discovery was made at approximately 3am on Monday.
Nine men, three women and two girls were assessed by medical personnel.
It is understood they have been transferred for processing by the international protection service.
An Garda Siochana, said investigations are ongoing.
The seaport handles passengers and freight from the United Kingdom and Europe, including France and Spain.
As the Irish Examiner reports, Gardaí took over part of the terminal building in Rosslare to greet the fourteen individuals on arrival and a number of units from the National Ambulance Service were on hand to administer medical attention as required.
All on board the refrigerated trailer were understood to be in good health and once they were fully checked they were brought by gardaí to CityWest in Dublin for "processing".