Gunmen kill 15 Egyptian border guards near Libya: officials
Egyptian President Abdel Fattah al-Sisi has repeatedly expressed concerns that militants who have capitalized on the chaos in Libya and set up operations along the border pose a threat to the Cairo government.
Security officials say militants based in camps over the Libyan border pay smugglers to transport weapons, including machineguns, to comrades in Egypt, which is facing an Islamist insurgency based in the Sinai Peninsula near Israel.
Tribal smugglers told Reuters they charge up to one million Egyptian pounds ($140,000) to move weapons in four-by-four vehicles along desert routes.
Five border guards were killed in a similar attack in the same area a few months ago.
Security officials say militants along the Libyan border harbor ambitions similar to the al Qaeda breakaway group that has seized large swathes of Iraq - they want to topple Sisi and create a caliphate in Egypt.
Egypt considered launching a cross-border offensive several months ago in a bid to crush the militants, according to two Egyptian national security officials.