Published Wednesday, 02 October 2013
Michaella McCollum and Melissa Reid, when they were stopped at Lima airport. (© UTV)
Juan Mendoza, who is in charge of their case, made the comments after the two 20-year-olds made a second appearance before a judge on Tuesday.
The hearing at Sarita Colonia del Callao jail near Lima was in private but Mr Mendoza suggested their confessions had not yet satisfied prosecutors.
The pair pleaded guilty to drugs offences behind closed doors before a judge last week.
It was thought this would lead to shorter jail terms at sentencing which was due to happen on Tuesday - but prosecutors have told them they want a full confession.
Mr Mendoza, who spoke to the Associated Press, would not discuss whether either had explained how they got the cocaine they were found with, or who it was from.
Irish priest Father Maurice Foley visited the pair on Saturday and said they were doing "very well".
He said McCollum Connolly, from Co Tyrone and Reid, from Scotland, were not in a cell but at a table in a wide open yard.
They were transferred to a more modern, well equipped prison after spending time in harsh conditions at Virgen de Fatima Prison in Lima.
McCollum and Reid had claimed they were held at gunpoint and threatened by a Columbian drugs gang to smuggle 24lb of cocaine, which was found hidden inside food packages in their luggage as they attempted to board a flight to Spain this summer.
The women, who had been working on Ibiza, were told that they could face a minimum of six years and eight months with no eligibility for parole after pleading.
But if their pleas are not accepted they could be sentenced to up to 15 years in prison.
The priest said McCollum had become emotional when he warned her that she shouldn't expect to serve anything as short as a year in prison.
He said that the young women didn't know any more on the drugs gang responsible to comply with the prosecutors' call for a more detailed confession.
© UTV News