Cairo clashes leave dozens of Mohammed Morsi supporters dead as Muslim Brotherhood calls for uprising - Follow live updates.
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Holding General Abdel Fattah al-Sisi responsible, the Muslim Brotherhood described the shooting as a "horrible crime" in a statement posted on Facebook.
Muslim Brotherhood's leader Mohammed Badie says that the
army chief wants to drive Egypt to the same fate as Syria, Reuters reports.
The BBC's Quentin Sommerville tweets:
<noframe>Twitter: Quentin Sommerville - Aside from wooden batons the protestors here appear to be unarmed.</noframe>
There are several reports that several women and children
are amongst those killed in the early morning attack.
Witnesses, including Brotherhood supporters at the scene,
said the army fired only tear gas and warning shots and that "thugs"
in civilian clothes had carried out the deadly shooting.

Egyptians wave the national flag from a building rooftop as hundreds of
thousands flood Cairo's Tahrir Square to demontrate against ousted President
Mohammed Morsi and in support of the Egyptian Army
Mohamed ElBaradei, the Nobel laureate and presidential
hopeful tweets:
<noframe>Twitter:
Mohamed ElBaradei - Violence begets violence and should be strongly
condemned. Independent Investigation a must. Peaceful transition is only
way .</noframe>
Egypt orders Islamist party HQ closure over arms find, AFP
reports.
Turkey's foreign minister Ahmet Davutoglu has condemned
the Cairo shooting, describing the incident as a "massacre" and
calling for the start of a normalisation process.
"I strongly condemn the massacre that took place in Egypt at morning
prayer in the name of the fundamental human values which we have been
advocating," Mr Davutoglu said on Twitter.
The Brotherhood's official spokesman, Gehad El-Haddad, who is at
a pro-Morsi sit-in at a mosque near the scene of the attack, said shooting
broke out in the early morning while Islamists were praying and
staging a peaceful sit-in outside the Cairo military barracks.
As an immediate consequence, the ultra-conservative Islamist Nour party, which
initially supported the military intervention, said it was withdrawing from
stalled negotiations to form an interim government for the transition to
fresh elections.
Egyptian army soldiers take their positions near armoured vehicles to
guard the entrances of Tahrir square in Cairo
Egypt's stock market fell sharply in the opening minutes
of trade after the violence at the Cairo headquarters of the Republican
Guard.
The main index was down 2.5 per cent. It surged 7.3 per cent last Thursday
after the ouster of Mr Morsi raised hopes for the installation of a
technocratic government that could address economic problems, but has
dropped back since then.
Both of the Egyptian soldiers, who were identified as Samir
Abdallah Ali and Azzam Hazem Ali, were put in a vehicle and
forced to make pro-Morsi and anti-army statements on a loudspeaker, the army
official said, cited by state news agency MENA.
An army official states that two Egyptian soldiers have
been seized by Morsi loyalists.
The Muslim Brotherhood movement, which has refused to accept the
army's toppling of its champion Mr Morsi, who won Egypt's first freely
contested presidential election, called for international intervention to
prevent a Syria-style civil war.

Egyptian supporters of the Muslim Brotherhood rallying in support of
deposed president Mohamed Morsi clash with police outside the elite
Republican Guards base in Cairo
Cairo Good morning and welcome to our live
updates after a night of violence in Cairo that left dozens of Morsi
supporters dead.