Protesters bearing stones and fireworks have clashed with riot police in Cairo for an eight day running.
Demonstrations have spread across the country since the second anniversary of the uprising that toppled Hosni Mubarak on January 25.
According to protesters and medical sources, one protester was killed with live ammunition today and at least 54 were wounded in protests across the country.
It is thought that nearly 60 people have died in clashes over the past week.
The presidential palace in Cairo has been a focal point for unrest with riot police responded to stones and petrol bombs with water cannon and teargas.
With multi-coloured fireworks bouncing off their shields and bursting among them, helmeted and baton-wielding riot police chased protesters at the palace and set their tents ablaze.
Earlier, men dressed in mourning black marched through the Suez Canal city of Port Said, scene of the worst bloodshed of the past eight days, chanting and shaking their fists.
The head of the Republican Guard, which protects the palace, condemned what he described as attempts to climb the compound walls and storm a gate.
In a statement to the state news agency, he urged protesters to keep their demonstration peaceful.
Earlier, men dressed in mourning black marched through the Suez Canal city of Port Said - the scene of the worst bloodshed of the past eight days.
In Alexandria, protesters blocked roads, staged a sit-in on the railway and tried to break into the TV and radio building.
There were also scuffles earlier near Cairo's central Tahrir Square - the spiritual home of the uprising and a continual focal point for rallies and demonstrations.
The protesters accuse President Mohamed Mursi of betraying the spirit of the revolution by concentrating too much power in his own hands and those of his Muslim Brotherhood.