Hotuna da Dumi-Duminsu Daga Masar, 26 Disamba 2013

Activists shout anti-terrorism slogans as they hold posters with Arabic slogans that read, "Egypt is entrusted to us. The army and people are one hand," during a rally in Cairo, Dec. 26, 2013.

An activist holds a sign with an anti-terrorism picture and Arabic that reads "terrorists brotherhood" during an anti-terrorism demonstration in Cairo, Dec. 26, 2013.

Egyptian police stand guard after an explosion hit a public bus in Cairo's eastern Nasr City district, Dec. 26, 2013.

Bus driver Adel Abd El Fatah sits inside a damaged bus after a bomb blast near the Al-Azhar University campus in Cairo's Nasr City district, Dec. 26, 2013.

Egyptians carry the coffin of a victim killed in an explosion at a police headquarters in the Nile Delta city of Mansoura, Egypt, Dec. 24, 2013.

An Egyptian man makes his way through rubble at the scene of an explosion at a police headquarters building in the Nile Delta city of Mansoura, Egypt, Dec. 24, 2013.