Thousands flocked to Cairo's central Tahrir square on Tuesday for a protest against Egypt's president in a significant test of whether the opposition can rally the street behind it in a confrontation aimed at forcing the Islamist leader to rescind decrees that granted him near absolute powers.

Waving Egypt's red, white and black flags and chanting slogans against President Mohammed Morsi and his Muslim Brotherhood, the protesters joined several hundreds who have been camping out at the square since Friday demanding the decrees be revoked.