Three men held over a bomb find in Lurgan have won the first stage of a legal case to guarantee conversations with their solicitors will be private.
The explosive material was found during police searches
If the men are successful police must agree not to monitor the meetings. The three men are being held at Antrim police station.
They were arrested along with one other man after the police seized 250 pounds of explosives in the town on Wednesday.
The High Court ruled that a senior judge will review the PSNI's position.
The hearing has been adjourned until Monday, when a date will be fixed for the case.
However, on Thursday evening, Mr Justice Gillen and Mr Justice Weir refused a request by the men's barrister to suspend police interviews with them until after the review was finished.
A previous court challenge to get the police to give assurances that the meetings would not be monitored had been unsuccessful.
The four men, who aged 22, 26, 36, and 46, are being held under the Terrorism Act.