ismailia egypt least 24 militants six soldier kill sunday attack military outposts north sinai egyptian military say statement statement give detail security medical source say 20 members security force also injure 100 militants repeatedly attack security outposts south border town sheikh zuweid attackers use car bomb rocket propel grenades rpg source say militants also clash security force use light weapons source add islamic state claim responsibility attack hours late air raid sirens go part southern israel israeli military say two rocket fire sinai israel immediate report damage injuries friday militant group claim attack security force peninsula kill least six soldier egypt fight insurgency militants affiliate islamic state sinai peninsula hundreds soldier police kill since 2013 military oust islamist president mohamed mursi mass protest militants also extend campaign part egypt recently attack church cairo cities loss dozens live 24 militants six soldier kill attack egypt 's sinai military say