The names of two of the three men arrested in Slovakia on suspicion of running arms for the "Real IRA" have been released.
The two men, both from the Cooley peninsula in Co Louth, were named as Mr Declan Rafferty and Mr Mickey McDonald. They are both in their 40s.
The third man has not been named, but is believed to be from Northern Ireland.
The three men were detained on Thursday night. They appeared before a local court on Friday, where they were remanded in custody for 40 days.
They were held under warrants from British police under the UK Prevention of Terrorism Act.
Their extradition to the UK is sought under four warrants: membership of a proscribed organisation; fund-raising for the purpose of terrorism; seeking to enter into arrangements for the purposes of terrorism; and conspiracy charges.The UK has issued warrants for the extradition of the three, which means they could face trial in London or Belfast.
It is the second time members of the "Real" or Continuity IRA have been detected attempting to acquire weapons in eastern Europe. Last August police in Croatia seized an arms shipment which was on its way to the Republic.
Arms from the former Eastern Bloc countries have reached the "Real IRA" in the past two years.