300 killed in horrific attack on Egypt mosque

Egypt has mounted a wave of air strikes against fighters they believe carried out the bombing of a mosque in northern Sinai. More than 300 worshippers were killed on Friday in the attack by militants who were carrying the flag of the Islamic State group. The BBC's Sally Nabil has been covering the aftermath of the attack and tells us witnesses said about 25 to 30 assailants turned up and started spraying worshippers with bullets.