51 killed, 435 injured in fresh Egypt clash
"The clashes left at least 51 civilians dead and 435 injured," the ministry of health said in its latest update.
The army arrested over 200 attackers, who were carrying guns, ammunition, and Molotov cocktails, according to the state-run MENA news agency.
The clash took place outside the the Republican Guard headquarters, where 61-year-old toppled president is said to have been put "under guard".
The army, in a statement, said "an armed terrorist group tried to storm" the Republican Guard compound and soldiers retaliated by firing.
The statement said one army officer was killed and 40 soldiers were injured during the incident.
However, the Muslim Brotherhood contradicted army's statement, saying military opened fired on its supporters, killing several pro-Morsi protesters.
Egypt's interim administration led by Adli Mansour expressed "deep regret" for those killed in violence. It also formed a judicial committee to investigate the events.
The statement from the presidency stressed that everyone is guaranteed the right to protest, however it called on protesters to remain peaceful and avoid approaching vital institutions and military establishments.
Meanwhile, the Muslim Brotherhood in a statement called for Morsi's reinstatement and said the Shura Council, the parliament's only operating house that was dissolved last week, was the "solution" to the current turmoil.
"We will not compromise [Morsi's] legitimacy [to complete his presidential term] and will not accept any alternatives," the statement read.