yangon muslim militants myanmar stag coordinate attack 30 police post army base rakhine state friday least 59 insurgents 12 members security force kill army government say fight still go areas mark major escalation simmer conflict northwestern state since last october similar attack prompt big military sweep beset allegations serious human right abuse arakan rohingya salvation army arsa group previously know harakah al-yaqin instigate october attack claim responsibility early morning offensive warn treatment approximately 1.1 million muslim rohingya emerge majority buddhist myanmar contentious human right issue make transition decades harsh military rule appear spawn potent insurgency grow size observers say worry attack much large good organize october spark even aggressive army response trigger communal clash muslims buddhist ethnic rakhines news team affiliate office national leader aung san suu kyi say one soldier one immigration officer 10 policemen 59 insurgents kill fight early morning a.m. extremist bengali insurgents start attack police post ... man-made bomb small weapons say army separate statement refer rohingya derogatory term imply interlopers bangladesh militants also use stick swords destroy bridge explosives army say rohingya deny citizenship see many myanmar illegal immigrants bangladesh despite claim root region go back centuries communities marginalize occasionally subject communal violence military counter-offensive october result 87,000 rohingya flee bangladesh join many others flee myanmar past 25 years unite nations say myanmar security force likely commit crimes humanity offensive begin october friday unite nations condemn militant attack call party refrain violence unite state also condemn attack security force warn government indiscriminate reprisals government security force act prevent violence bring responsible attack justice expect way consistent rule law protect respect human right fundamental freedoms demonstrate transparency avoid inflame tense situation u.s. state department say statement military say 150 rohingya attack army base taung bazar village buthidaung township among police post attack station majority-rakhine village kyauk pandu 40 km 24 miles south major town maungdaw police officer kyaw win tun say insurgents burn post police call gather main station residents fearful darkness approach hear lot muslim villagers group together make attack us sun go say maung maung chay rakhine villager hamlet attack take place hours panel lead former u.n. chief kofi annan advise government long-term solutions violence-riven state annan condemn violence friday say cause justify brutality senseless kill military source tell reuters estimate 1,000 insurgents take part offensive encompass maungdaw buthidaung townships much wide area compare october leader arsa ata ullah say hundreds young rohingya join group say wag legitimate defence army human right take defensive action burmese maraud force 25 different place across region soon group say twitter chris lewa rohingya monitor group arakan project say major concern happen 700 rohingya villagers trap inside section zay di pyin village surround rakhine vigilantes arm stick swords run live say one zay di pyin rohingya villagers reach telephone add house set fire government say village burn blame fire rohingya amid rise tension past weeks 1,000 new refugees flee bangladesh border guard friday push back 146 people try flee violence mohammed shafi live rohingya refugee camp bangladesh say cousin myanmar tell trouble military everywhere people cry mourn dead shafi say things turn real bad scary least 71 kill myanmar rohingya insurgents stage major attack