Egypt's opposition said it would continue to protest an upcoming referendum on a draft constitution even after President Mohamed Morsi canceled decrees that gave him virtually unlimited power.
Late Saturday night, Morsi withdrew the decrees that gave him immunity from judicial oversight. But he continues to insist on going forward with the scheduled Dec. 15 referendum.
The opposition, led by the National Salvation Front, is objecting to the draft constitution in part because it would enshrine Islamic law.
Demonstrators have been protesting outside the presidential palace, and the Cairo headquarters of the Muslim Brotherhood, to which Morsi belongs, were set on fire.
A million man march demonstration opposing the draft constitution has been called for Tuesday.