cairo egypt security force suffer one heavy attack militants fire rocket detonate explosives hit police operation friday western desert authorities security source say saturday three security source say least 52 police officer conscript kill gun battle erupt remote desert egyptian authorities say 16 men die patrol come attack egyptian authorities saturday say two police operations move suspect militant hideout friday one patrol come fire heavy weapons remote area around 135 km southwest cairo interior ministry say 16 police kill part operation 13 wound least 15 militants also kill gun fight statement give detail casualties police patrol soon first mission approach location terrorist elements sense arrival force target use heavy weapons directions interior ministry say statement one security source say convoy attack high grind militants fire rocket-propelled grenades detonate explosive devices grind security key point president abdel fattah al-sisi former military commander present bulwark terrorism lead ouster president mohamed mursi muslim brotherhood 2013. sisi elect landslide year late though yet declare intentions sisi widely expect run re-election april next year little opposition critics say popularity dim security economic austerity policies group make claim statement friday operation far capital fight far militants security force northern sinai islamic state affiliate operate security source early say police hunt hideout hasm movement islamist militant group blame attack judge police around capital group past carry mostly small operations since emerge last year egyptian authorities say arm militant wing muslim brotherhood islamist group outlaw 2013. leadership jail crackdown sisi since sisi come power hundreds troop police kill often sophisticate attack militants northern sinai region ansar bayt al-maqdis group pledge allegiance islamic state 2014. last sunday least 24 militants six soldier kill attack military outposts north sinai 100 militants repeatedly attack security outposts south border town sheikh zuweid attack mostly hit police arm force militants also extend campaign outside sinai target egypt christians bomb attack church cairo cities militants attack egypt police dozens kill source