Clashes have erupted on Tahrir Square and Mohamed Mahmoud street, adjacent to Cairo's symbolic square, between supporters and opponents of the Muslim Brotherhood (MB).
According to the latest reports, at least 42 people have been injured as eyewitnesses reported incidents of rock throwing between the two groups. A makeshift hospital was set up near Cairo's symbolic square.
Earlier clashes broke up between the two groups after supporters of the Muslim Brotherhood (PM) attacked a stage set up by an opposition group.
Members of the Muslim Brotherhood called for a protest on Friday to condemn the acquittal of all 24 defendants in the Cairo "Camel Battle" case soon after opposition groups announced their intention to organise a rally to mark Morsi's first 100-days in office.
Morsi's opponents are demanding further reforms such as the implementation of a minimum and maximum wage and a reformed Constituent Assembly that represents all Egyptians.
MB supporters chanted slogans condemning the judiciary's decision to acquit the 24 former regime officials, "We will avenge them or die like them," could be heard in Tahrir Square.