Unidentified gunmen attacked border guards in southern Egypt on Saturday , killing 21 and injuring four , according to Egypt 's state-run news agency MENA . The Egyptian army said a terrorist group fired a rocket-propelled grenade into an `` ammunition store '' at a checkpoint near Farfra . In an exchange of gunfire , some militants were killed , the army said . Two cars with explosives were also confiscated . `` 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 . The checkpoint is in Al-Wadi Al-Gedid province , which borders Libya and Sudan . It was not clear whether the guards were on their way to the border or were already on the border when they were attacked , according to MENA .
21 security guards were killed in attack , Egyptian state media said . Terrorists fired a rocket at ammunition stores , army said . The attack happened at a checkpoint in southern Egypt , near Sudan and Libya . A number of militants were killed and 2 cars with explosives confiscated , army said .