Supporters of ousted Egyptian President Mohamed Morsi carry the coffins of people killed a day before during the clashes outside the Republican Guard headquarter, in Nasr City, Cairo, Egypt, July 6, 2013. (Xinhua/Wissam Nassar)

 

A supporters of ousted Egyptian President Mohamed Morsi holds up a poster of Morsi outside the Republican Guard headquarter, in Nasr City, Cairo, Egypt, July 6, 2013. (Xinhua/Wissam Nassar)

 

Supporters of ousted Egyptian President Mohamed Morsi sit around the coffins of people killed a day before during the clashes outside the Republican Guard headquarter, in Nasr City, Cairo, Egypt, July 6, 2013. (Xinhua/Wissam Nassar)

 

Supporters of ousted Egyptian President Mohamed Morsi carry the coffins of people killed a day before during the clashes outside the Republican Guard headquarter, in Nasr City, Cairo, Egypt, July 6, 2013. (Xinhua/Wissam Nassar)

 

A supporter of Morsi holds up Quran as he attends sit-in outside the Republican Guards headquarters in Nasr city, Cairo, Egypt, July 6, 2013. (Xinhua/Li Muzi)

 

A soldier stands outside the Republican Guards headquarters in Nasr city, Cairo, Egypt, July 6, 2013. (Xinhua/Li Muzi)

 

Soldiers guard outside the Republican Guards headquarters as supporters of ousted Egyptian president Mohamed Morsi protest in Nasr city, Cairo, Egypt, July 6, 2013. (Xinhua/Li Muzi)

 

A Morsi supporter holds up a portrait of Egypt's ousted president Mohamed Morsi as he attends sit-in outside the Republican Guards headquarters in Nasr city, Cairo, Egypt, July 6, 2013. (Xinhua/Qin Haishi)

 

The shadow of a Morsi's supporter is seen on a Morsi's poster outside the Republican Guards headquarters in Nasr city, Cairo, Egypt, July 6, 2013. (Xinhua/Li Muzi)

 

A supporter with ousted Egyptian president Mohamed Morsi's mask on his face protests outside the Republican Guards headquarters in Nasr city, Cairo, Egypt, July 6, 2013. (Xinhua/Li Muzi)

 

A Morsi's supporter holds up a portrait of Egypt's ousted president Mohamed Morsi as he attends a protest outside the Republican Guards headquarters in Nasr city, Cairo, Egypt, July 6, 2013. (Xinhua/Qin Haishi)

 

Supporters of ousted Egyptian president Mohamed Morsi holds a poster of Morsi as they protest outside the Republican Guards headquarters in Nasr city, Cairo, Egypt, July 6, 2013. (Xinhua/Li Muzi)

 

A supporter of Egyptian ousted president Mohamed Morsi holds up a portrait of Morsi as he attends a protest outside the Republican Guards headquarters in Nasr city, Cairo, Egypt, July 6, 2013. (Xinhua/Qin Haishi)

 

Supporters of Egyptian ousted president Mohamed Morsi participate a protest outside the Republican Guards headquarters in Nasr city, Cairo, Egypt, July 6, 2013. (Xinhua/Qin Haishi)

 

A supporter of ousted Egyptian president Mohamed Morsi prays outside the Republican Guards headquarters in Nasr city, Cairo, Egypt, July 6, 2013. (Xinhua/Li Muzi)