Teargas floated over Cairo Saturday after protesters took on police to protest new President Mohamed Morsi granting himself even more authority.
Most of the confrontations happened around Tahrir Square, where a day earlier, thousands of protesters converged to denounce Morsi's decree, with many saying it bordered on dictatorship, demonstrators told CNN.
Saturday's demonstrations saw scores of people with breathing difficulties from the gas, the Egypt Independent reported. Officials at Mounira Public Hospital said 32 people were being treated for injuries and five people were in critical condition from gunshot wounds, although there were no police reports of shots being fired.
By late morning, state television quoted the Interior Ministry as saying 210 protesters had been arrested, 44 of them juveniles.
Ahram Online quoted protesters shouting that the 61-year-old Morsi, a member of the Muslim Brotherhood, is no better than the autocratic former President Hosni Mubarak, who was unseated last year.
Morsi was elected in June.
His proclamation Thursday said until a new constitution can be approved in about six months, neither parliament nor the courts can overturn anything he has done or will do in the interim.