NEW : An opposition group demands that officials be sacked over the crackdown . Noor Noor , the son of presidential candidate Ayman Noor , was seen bleeding with a serious injury to his eye and was later transferred to the hospital . Hundreds of protesters are killed at the scene and dozens end up in hospitals . Police use tear gas and rubber bullets against protesters . Freedom Square was the heart of the revolt against then - President Hosni Mubarak .
NEW : An opposition group demands that officials be sacked over the crackdown . Hundreds of protesters are killed at the scene and dozens end up in hospitals . Police use tear gas and rubber bullets against protesters . Freedom Square was the heart of the revolt against then - President Hosni Mubarak .