After the mass trial was adjourned for the 25th time in August, news of his acquittal was announced by Colm O'Gorman of Amnesty International, who wrote via Twitter:

Breaking: Ibrahim Halawa has been acquitted of charges. Verdict just emerging in Cairo. Really, really good news. #FreeIbrahim

— Colm O'Gorman (@Colmogorman) September 18, 2017

CONFIRMED: after 4 years of detention & mass trial involving 494 defendants, Irishman Ibrahim Halawa acquitted of all charges #FreeIbrahim

— Colm O'Gorman (@Colmogorman) September 18, 2017

Ibrahim Halawa, moments after his acquittal. He jumped with joy, hugged fellow prisoners and had tears in his eyes. pic.twitter.com/P40IjYQLHK

— Declan Walsh (@declanwalsh) September 18, 2017

Halawa had been imprisoned since 2013, during which time he was arrested for participating in a peaceful protest against the removal of the then-Egyptian President Muhammed Morsi.

His three sisters were acquitted of their charges while on bail.

Halawa is expected to be released in the coming days.