London: At least three people have died and 350 have been injured in the worst violence since Mohamed Morsi became Egypt's first Islamist president in June.
Rocks and petrol bombs were thrown as supporters of Morsi tried to break up an opposition sit-in outside the presidential palace.
According to the BBC, clashes in Cairo continue to grow over a controversial draft constitution.
Critics say the draft was rushed through parliament without proper consultation and that it does not do enough to protect political and religious freedoms and the rights of women.
The draft added to the anger generated by Morsi passing a decree in late November, which granted him wide-ranging new powers.
Meanwhile, four of Morsi's advisers resigned on Wednesday in an apparent protest, the report said.