The march comes amid rising anger over the draft charter and decrees issued by Mohammed Morsi giving himself sweeping powers. Morsi called for a nationwide referendum on the draft constitution on Dec. 15.

It is Egypt's worst political crisis since the ouster nearly two years ago of authoritarian president Hosni Mubarak. The country has been divided into two camps: Morsi and his fundamentalist Muslim Brotherhood, as well as ultraconservative Salafi Islamists versus youth groups, liberal parties and large sectors of the public.

Hundreds of black-clad riot police deployed around the Itihadiya palace in Cairo's district of Heliopolis. Barbed wire was also placed outside the complex, and side roads leading to it were blocked to traffic. Protesters gathered at Cairo's Tahrir square and several other points not far from the palace to march to the presidential complex.