ABC News(CAIRO) -- Cairo's central square on Wednesday is once again the scene of violent anti-government protests.



Egyptian riot police are using tear gas and firing rubber bullets, but a few thousand protestors are refusing to leave the area around Tahrir Square. Some of them are throwing rocks and firebombs at the police. Dozens have been injured.



Many of the protestors are reportedly relatives of the 850 people killed during the revolution that took place earlier this year, which prompted Hosni Mubarak to step down as Egypt’s president.



Demonstrators say they're angry that the new military government hasn't begun prosecuting the police who protestors believe are responsible for those deaths. Others say they're frustrated by the slow pace of political reform.

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