Scuffles have broken out between protesters and police officers outside the trial of Hosni Mubarak, Egypt's ousted president, as the court prepares to hear from police witnesses who were in the operation room during the crackdown on pro-democracy demonstraters.
Al Jazeera's Sherine Tadros, reporting from Cairo, said more police had been deployed than the previous two sessions.
"Some of the people gathered outside the court room have started throwing rocks at the riot police," she said.
"This is something we saw in the last two sessions as well, where there was rock throwing at each other by pro and anti Mubarak protesters. Now it seems to be concentrated at the riot police. It is indicative of the kind of emotions this trial is evoking."