Five of the seven Pakistani businessmen held by immigration officials at Dublin Airport and detained for three nights at Mountjoy training unit have not used their return tickets home.
On November 30th, the men left the Hotel Capri on Abbey Street where they had been staying.
Five of them were due to fly home with Sabena Airlines. However, they have failed to use or change their return tickets from Dublin to Karachi.
Two of the men had return tickets from London.
The group arrived from Zurich on November 24th with valid passports and three-month business visas.
On their arrival, the men gave the contact address of Finlay's building block company in Ballygawley, Co Tyrone, whose machinery they were considering importing to Pakistan.
Immigration officials detained the men after they suspected they would try to use Northern Ireland to enter Britain, for which only two of the group had valid holiday visas.