Angry scenes have played out both inside and outside the Cairo courtroom where the trial of ousted Egyptian president, Hosni Mubarak, has resumed.
Mr Mubarak, 83, faces charges of ordering the killing of demonstrators during the uprising earlier this year. He denies the charges.
The judge halted proceedings several times after scuffles between defence and prosecution lawyers, as well as families of those killed.
A BBC correspondent at the scene said there were even scuffles inside the court, and during a recess in the trial, someone raised a photo of the former president - which was then seized and burnt.
The session began after a helicopter flew in the ailing Mr Mubarak from his Cairo hospital. A witness said he was wheeled into court on a stretcher.
The court has heard from several senior police officers who were on duty during the 18-day uprising in Cairo's Tahrir Square in January and February during which 850 people were killed.
According to lawyers at the trial, the officials said they had been given orders to use teargas and water cannons.
Hosni Mubarak's two sons, Alaa and Gamal, who are charged with abusing power to amass wealth, were also at the session.