State security police fire tear gas at rock throwing protesters on the periphery of Tahrir square, where tens of thousands are demonstrating on the second anniversary of the revolution.
Protesters involved in clashes with police on Qasr el Ainy street - moments from Tahrir Square - say that state security forces have fired birdshot at them, in addition to throwing rocks and shooting tear gas.
Witnesses say the clashes began on the evening of the 24th January when demonstrators attempted to take down a huge concrete wall on Qast el Ainy erected by security forces.
The fighting continued through the night and into the 25th - the second anniversary of the Egyptian uprising in 2011.
Tens of thousands of demonstrators are filtering through to Tahrir Square demanding the realisaiton of the revolution's goals, justice for those who died and an end to the Muslim Brotherhood's monopoly on state power.
Video by Simon Hanna