Political activist Ahmed Douma of the 6 April movement looks on behind bars in Cairo, December 22, 2013 (Photo: Reuters)
The trial of 269 people, including prominent activist Ahmed Douma, has been adjourned until 9 April.
The defendants are accused of attacking the cabinet building and security personnel, and torching the Scientific Institute in downtown Cairo in December 2011.
The violence erupted after security forces violently dispersed a peaceful sit-in outside the cabinet building.
At least 17 people were killed and over a thousand injured in clashes that spanned five days.
Douma is a member of the Egyptian Popular Current movement, which is led by Hamdeen Sabahi -- the only person to announce he will challenge former army chief Abdel-Fattah El-Sisi in the upcoming presidential election.
Tuesday was the tenth hearing of the trial.
In a separate trial in December, Douma was convicted, alongside prominent activists Ahmed Maher and Mohamed Adel, for organising unauthorised protests and assaulting police officers. They have appealed their three-year jail sentences.
Douma, who went on a hunger strike in December to protest "inhumane" jail terms, is in poor health, and there is an ongoing campaign for him to receive appropriate medical care for a seious digestion condition.
Activists have criticised what they described as the authorities’ negligence towards Douma's deteriorating condition.
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