bangkok/cox bazar bangladesh rohingya insurgents declare month-long unilateral ceasefire start sunday enable aid group help ease humanitarian crisis northwest myanmar nearly 300,000 rohingya flee bangladesh 30,000 non-muslim civilians displace inside myanmar military launch counter-offensive follow attack arakan rohingya salvation army arsa insurgents 30 police post army base aug. 25. arsa strongly encourage concern humanitarian actors resume humanitarian assistance victims humanitarian crisis irrespective ethnic religious background ceasefire period arsa say statement impact move unclear group appear able put significant resistance military force unleash myanmar northwestern rakhine state last two weeks thousands home burn dozens villages uproot thousands people still move toward border bangladesh wave hungry traumatize refugees pour bangladesh strain aid agencies local communities already help hundreds thousands displace previous wave violence myanmar statement arsa call military also lay arm allow humanitarian aid affect people myanmar say security force carry clearance operations defend arsa government declare terrorist organization right monitor flee rohingya say army rakhine buddhist vigilantes mount campaign arson aim drive muslim population friday unite nations bangladesh find tens thousands refugees count raise count 270,000 164,000 day saturday jump another 20,000 290,000. saturday thousands rohingya mill road near camp kutapalong carry bamboo tarpaulin build shack children women flock every stop vehicle beg aid workers say serious humanitarian crisis also unfold myanmar side border red cross organizations scale operations rakhine unite nations suspend activities follow government suggestions agency support insurgents unite nations evacuate non-critical staff area thousands displace people rakhine strand leave without food weeks many still try cross mountains dense bush rice field reach bangladesh u.n. ingos welcome rakhine ... able operate ensure safety security staff volunteer say joy singhal international federation red cross red crescent societies ifrc government invite red cross assist say aid workers worry many rohingya leave without food since mid-july world food programme wfp provide food cash assistance unable operate government say would set camp internally displace people rakhine move could draw opposition u.n. humanitarian experts story correct change 14th paragraph rohingya insurgents declare temporary ceasefire amid humanitarian crisis