At least 30 people were killed and 1,076 others were wounded during violent disturbances in Egypt, state television reported Saturday, citing Health Ministry sources.
Supporters and opponents of deposed Islamist President Mohammed Morsi faced off on Friday in different parts of the country on a day of rival demonstrations.
At least four people were killed outside the headquarters of the Republican Guard in Cairo, where Islamist protesters believe Morsi is being held, according to the Attorney General's Office.
Meanwhile, calm was restored Saturday in the vicinity of the capital's Tahrir Square, where disturbances the day before prompted the armed forces to send in tanks.
In a statement in recent hours, the pro-Morsi Muslim Brotherhood movement called for protests to continue in Egypt until the ousted leader is reinstated.
The Islamist protesters remain gathered at the Raba El-Adwyia mosque square in the Cairo district of Nasr City to press their demands for a return to the constitutional order and the scrapping of all decisions taken in the wake of Wednesday's military coup.
Morsi's Islamist supporters have held protests since Wednesday's coup, when the armed forces suspended the constitution that Morsi enacted during his abbreviated term in office and named Adli Mansour, the head of the Supreme Constitutional Court, as interim head of state pending fresh elections.
The military acted following days of massive anti-government protests.
Critics accused Morsi and the Brotherhood of doing little to address poverty and Egypt's struggling economy, of failing to advance the goals of the 2011 revolution that forced out strongman Hosni Mubarak and of seeking to monopolize power.
In its statement, the MB also demanded the punishment of security forces responsible for "murdering demonstrators, arresting political leaders and shuttering satellite television channels."
Among the MB leaders arrested in recent days is the group's No. 2, Khairat El-Shater, who was detained Friday for allegedly inciting his followers to kill rival demonstrators. EFE