The mosque which became an epicentre of Wednesday's violence in Cairo was completely destroyed in the carnage, new photos show.
The images show the burnt-out interior of the Rabaa al-Adawiya mosque, with rescue workers frantically trying to salvage anything they can.
Although the external structure of the building is still standing, the walls are charred and the floors are scattered with smouldering debris.
The mosque was adjacent to one of two huge protests camp set up by supporters of deposed president Mohamed Morsi. The violence began when government security forces tried to disperse the camps, using tear gas and live ammunition to quell any resistance.
According to Egypt's health ministry, 638 people were killed in the crackdown. The incident provoked Egypt's military-backed government to issue a state of emergency, and Muslim Brotherhood supporters have called for a nationwide march in response to what they perceive as a massacre.
In the immediate aftermath of the government crackdown, the Muslim Brotherhood supporters set the Giza governorate building and three churches in Cairo ablaze. The interim government has since warned it will turn its guns on anyone who attacked the police or public institutions, Reuters reported.
Scroll down to view how the Rabia Al-Adawiya mosque, what used to be famous shrine in Cairo, was decimated in Wednesday's clashes.