Cairo police are now searching for two men on a motorbike who opened fire on guests at a church wedding, killing four including an eight-year-old.
With Egypt's president looking increasingly isolated after being pressured to step down, here are three possible scenarios for the country.
Iran's foreign ministry has criticised the killing of four Shi'ite Egyptians by a hostile crowd, saying such extremism violated the tenets of Islam.
A Cairo court has sentenced 43 Egyptian and foreign employees of several NGOs to jail for one to five years for working illegally.
Egypt's Hisham Qandil has demanded an investigation after 19 tourists died in a hot-air balloon crash near the ancient temple city of Luxor.
A hot air balloon in Egypt has exploded during a sunrise flight over the west bank of Luxor, killing 19 tourists who were on it.
Opposition-led protests have spread across Egypt over a decree affording President Mohamed Morsi sweeping powers immune from judicial oversight.