Seven Pakistani businessmen released from prison yesterday after being held for three nights are considering suing the State for compensation.
One of the men has said he was "treated like a slave" following the detention of his group by immigration officials at Dublin Airport last Friday.
Lawyers for the men, who had valid passports and three-month business visas, described their weekend detention in the training unit beside Mountjoy Prison, Dublin, as a "dreadful mistake".
However, the State told the High Court yesterday that while it agreed to their release after inquiries had been made, it was not conceding the decision to detain them had been made wrongfully.
On their arrival at the airport, the men stated on their landing cards that they would be staying in an unspecified hotel in Dublin. They also gave the contact address of a company in Ballygawley, Co Tyrone, whose machinery they are considering importing to Pakistan.
Immigration officials suspected the men would try to enter the UK, which only two of the group had valid holiday visas for. They were imprisoned and had their passports, money and flight tickets confiscated.
Immigration officials had planned to deport them on Sunday. However, they contacted a solicitor, Mr David Christie, on Saturday and he secured a High Court injunction against their deportation that evening.
After their release yesterday, the men described their detention as "unimaginable". Mr Rasheed Akhtar Niazi said he had travelled throughout Europe and had never had such an experience.
He praised staff in the training unit who looked after their dietary needs after being informed they were Muslims.
"I can't say we are angry but it's a bit of a disappointment. I'm more cautious right now . . . The next time I am over here I'd have to make all pre-arrangements and be prepared and have someone meet me at the airport."
Mr Niazi, managing director of a business and trade consultants company, said he and his colleagues would now attempt to reschedule their plans.
Mr Christie, from Christie and Gargan Solicitors, said it was disgraceful that businessmen with proper visas and passports should have been detained.
"They should have been treated with a modicum of respect and decorum and that didn't apply."
He said his clients were considering suing the State.