The 'Anti-Coup Coalition', which has called for continued protests after over 800 people were killed in fierce street battles in the last four days, cancelled major rallies today, citing security concerns.
"Several marches in Cairo have been cancelled for security reasons," Yasmine Adel, the group's spokeswoman said. She added that some marches were taking place.
Meanwhile, Interim Prime Minister Hazem Beblawi has put forward a proposal to legally dissolve the Brotherhood.
His proposal to dissolve the Brotherhood raises the stakes in the struggle for the control of Egypt. If it is acted upon, it could force the group underground and allow its sources of funding to be targeted.
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Despite being closely allied to deposed President Morsi's government, the Brotherhood has always been a banned organisation, dissolved in 1954 by Egypt's military rulers. But it recently registered itself as a non-governmental organisation.
Meanwhile, Army chief Abdel Fattah al-Sisi warned that the forces will never be silent in the face of violence.
Al-Sisi, the general behind the "military coup" that toppled Morsi on July 3, made the statement during a meeting with military and police commanders.
He also said that the Army had no intention to seize power and even called for inclusion of Islamists.
Security had been beefed up at a key points ahead of planned mass rallies by pro-Morsi supporters with armoured vehicles and troops being deployed in southern Cairo.
Since Wednesday, over 800 people have died in clashes that erupted after security forces stormed two camps set up by Morsi loyalists in Cairo.
The country's cabinet was in the process of analysing the crisis and deciding upon a course of action that erupted after military's ouster of Morsi.