21 border guards were killed in attack , Egypt state media report . Terrorists fired a rocket at ammunition stores , army said . Comment: `` This incident will not discourage ( guards ) from carrying the national responsibility to protect and secure the country and hit the hotbeds of terrorism and extremism at all costs regardless of sacrifice , '' read an army statement . A number of militants were killed and 2 cars with explosives confiscated , army said .
21 border guards were killed in attack , Egypt state media report . Terrorists fired a rocket at ammunition stores , army said . Comment: A number of militants were killed and 2 cars with explosives confiscated , army said .