The trial of Ibrahim Halawa in Egypt has been postponed again - the 14th time the mass trial has been delayed.
The next court date has been set for October 2nd.
The Dubliner has been in jail for almost three years awaiting the mass trial.
The adjournment is pending a review of evidence by a technical committee to report by October.
Foreign Affairs Minister Charlie Flanagan says he is "extremely disappointed" at the news.
Speaking from Belfast, Mr Flanagan said: "This latest delay is a particular source of concern and frustration for Mr Halawa and his family. I fully share their sense of frustration."
"I will be conveying my concerns about this delay directly to the Egyptian government and, notwithstanding the separation of powers, I will be seeking more information of the review of technical evidence ordered by the Court and its likely impact on this trial."
Minister Flanagan says he met Mr Halawa's father and sister yesterday.
He says he reassured them of his and the Government’s commitment to achieving two objectives.
"To secure Ibrahim's return to Ireland as soon as possible, and to ensure his welfare during his detention. This case remains a key priority for me," Mr Flanagan added.
The Irish ambassador to Egypt was again present in court for today's hearing.
The most recent consular visit with Mr Halawa took place on May 29th, and the Department of Foreign Affairs says the embassy will make arrangements for a further such visit in the coming days.
"A devastating blow"
Amnesty International says there had been some earlier indication the trial process may have reached a conclusion today.
The Green Party says it is seeking the suspension of Dáil business to discuss the matter.
The party's deputy leader Catherine Martin said: "We’re calling for the Government to summon the Egyptian ambassador and seek Ibrahim Halawa’s unconditional release and return to Ireland as a matter of urgency."
We have sought the suspension of Dáil business, under a Private Notice Debate, to discuss the 14th delay of Ibrahim Halawa's trial in Egypt.
— Green Party Ireland (@greenparty_ie) June 29, 2016
The 20-year-old from Firhouse was arrested taking pictures of a Muslim Brotherhood protest while on holiday in Cairo in 2013.
A letter from Mr Halawa claims he has witnessed torture in jail.
He says inmates are strung up, with people hung from basketball hoops and "crucified" in hallways.
Speaking after today's postponement, Colm O’Gorman, Executive Director of Amnesty International Ireland, said the charity is 'outraged' at the latest delay.
“This is a devastating blow for Ibrahim and his family who have spent almost three years campaigning for justice. The Egyptian legal system has descended into further farce with this fourteenth delay in Ibrahim’s trial," he said.
