Thousands of supporters of President Mohamed Mursi forced out protesters gathered by the presidential palace on Wednesday, taking down their tents.
The president's opponents had announced a sit-in on Tuesday against a constitutional decree issued by Mursi and a draft constitution written by an Islamist-dominated assembly.
Clashes erupted between opponents and supporters earlier where they hurled stones at each other and chanted opposing slogans.
Tension fills areas surrounding the palace now as trucks of pro-Mursi supporters are parked nearby.
Mursi supporters cleared out anti-Mursi slogans written on the walls of the palace, chanting in support of the president and the Muslim Brotherhood, to which he belongs.