Lawyers at the inquest into the Stardust fire in Dublin which claimed the lives of 48 young people have heard that 81 new witnesses have been identified.
The additional witnesses and witness statements were found after a trawl of documents in the Departments of Housing and Justice.
Counsel Des Fahy, who is acting for families of the victims, said he was concerned by the "considerable" volume of new material.
The inquest, which sat today without the jury, is expected to hear from over 300 witnesses over the coming weeks and months.
Those who were working in the Stardust on the night in question are due to give evidence, as well as patrons and members of the emergency services who attended the scene.
Lawyers for the families also raised the issue of the potential unavailability of a witness on medical grounds.
Referred to as 'Witness 20', Counsel Des Fahy said he was someone "whom we are very interested".
He asked the coroner that counsel would be permitted to review the medical evidence saying the issue might arise with a number of other witnesses.
Coroner Myra Cullinane said she was sure to have sufficient medical information to make an informed decision and said there were lots of modalities that could facilitate the witness.
Mr Fahy said such modalities could include breaks for the witness and advanced questions.
The inquest is due to resume in the presence of the jury on 7 June.
