First Look Islamic extremists target Sufi mystics in Egyptian mosque attack

Members of an extremist group affiliated with the Islamic State militant group have been waging a stepped-up campaign of violence in northern Sinai for years, but this was the first major militant attack on a Muslim mosque.

Egyptian Presidency/AP

Militants attacked a crowded mosque during Friday prayers in the Sinai Peninsula, settling off explosives, spraying worshippers with gunfire, and killing at least 200 people in the deadliest ever attack on Egyptian civilians by Islamic extremists.