Thousands of opponents and supporters of Egypt's president are staging rival rallies in the nation's capital, four days ahead a nationwide referendum on the new constitution proposed by President Morsi.
The demonstrations got underway just hours after a crowd of masked men set upon opposition protesters staging a sit-in at Tahrir Square, attacking them and their tents with knives and sticks according to security officials.
A health ministry spokesman told Egyptian state news agency MENA at least 11 protesters were wounded in the pre-dawn attack.
Despite the ambush opponents of Morsi remain camped out in Tahrir Square this afternoon.
Rival political rallies are being held in Cairo, as Egypt's president prepares to attend 'unity talks' tomorrow.
In renouncing emergency powers he deemed essential just two weeks ago, Mohamed Morsi is trying to undo some of the damage he has inflicted.