There have been many other cases of protesters clashing with security forces, including some Sunday in Cairo, state-run Nile TV reported.

Since Thursday, at least 261 people have been injured in clashes in the Egyptian capital and elsewhere, according to EGYNews, which cited the Health Ministry but didn't break down who was hurt.

Interior Ministry spokesman Alaa Mahmoud said 128 police officers have been injured in clashes nationwide.

Meanwhile, thousands of other demonstrators have expressed their views without violence -- including by vowing to occupy Cairo's Tahrir Square, as was the case leading up to Mubarak's exit, until Morsy reverses course. By Monday morning, the landmark roundabout was filled, the number of white tents and demonstrators rising steadily over recent days.

"Mubarak, with all his arrogance and dictatorial tendencies, never gave himself the power that no one can appeal his decisions," protester Mohamed Abdul Wahab said, blasting Morsy for giving himself "the powers of a new pharaoh."

The two sides are even dueling when it comes to protests. The Muslim Brotherhood has announced a "million man" demonstration in support of Morsy at Cairo's Abdeen Square on Tuesday, the same day the opposition is planning a major protest.

The division has already taken its toll on Egypt's economy, with the country's stock market closing almost 10% lower Sunday at the end of the trading day, the market's first since Morsy's power consolidation.