No one immediately claimed Statement responsibility for the bombing Attack but Prime Minister Hazem Al Beblawi , on behalf of the interim government , was quick to blame Causation the Muslim Brotherhood of being behind the attack Attack , labeling Labeling it a `` terrorist Terrorism organization Arranging '' for the first time since the ouster of Mohamed Morsi on 3 July earlier this year .

Ansar Bait al-Maqdis , an Al-Qaeda-linked group in the Sinai Peninsula , released Statement an online statement Statement claiming Statement responsibility for the blast but the government sounded Change_sentiment determined Deciding that the Muslim Brotherhood was behind it and intensified Cause_change_of_strength its crackdown Attack on the organization Arranging .

The military arrested Arrest Morsi and Muslim Brotherhood leaders , and declared Expressing_publicly Chief Justice of the Supreme Constitutional Court Adly Mansour as the interim president of Egypt .

The Muslim Brotherhood and the National Coalition for Supporting Legitimacy ( NCSL ) stated Statement the number of deaths Death from the Rabaa al-Adawiya Mosque sit-in Social_event alone was about 2,600 .

In what the Muslim Brotherhood and its supporters deemed a `` massacre , '' dozens were killed Killing during clashes Hostile_encounter between Morsi supporters and Egyptian soldiers .

The massacre Killing , carried out by the Syrian Army under commanding General Rifaat al-Assad , effectively ended Process_end the campaign Social_event begun Process_start in 1976 by Sunni Muslim groups , including the Muslim Brotherhood , against the government .