cairo egyptian security force kill 13 militants raid farm hideout western desert region friday week deadly attack police convoy authorities say interior ministry statement give detail militants egyptian force battle several arm islamist group mostly focus entrench islamic state affiliate kill hundreds police officer troop northern sinai peninsula since 2013. take house farm temporary hideout faraway security monitor receive newly recruit elements train prepare explosive devices ministry statement say clash area near assuit-kharga desert highway around 400 km 248.55 miles southwest cairo new valley province share long border neighbor southern libya southern libya become hideout militant brigade take advantage security vacuum clash militants ministry say 13 body recover farm wear militant uniform security force also recover weapons suicide bomb belt cash ammunition statement say whether group link militants attack police last week remote area giza governorate 135 km outside cairo source say search militant hideout security force deal severe blow terrorist elements revenge blood men martyr last week oasis state news agency mena say early cite high-level security source egypt violence center northern sinai local group ansar bait al-maqdis pledge allegiance islamic state 2014. mostly target security force ambush suicide attack spread areas egypt outside peninsula western desert region long route smugglers arm come across libya porous border egyptian military say monday air force hit eight four-wheel-drive vehicles carry arm explosives western border libya kill militants board egypt kill 13 militants raid western desert farm