bamako rival tuareg group say thursday sign peace deal northern mali raise hop end years fight break ceasefires senior members separatist cma pro-government opponents know platform say settle differences arid region still reel 2012 islamist insurgency past deal fizzle goodwill fade though observers say optimistic pact sign bamako wednesday night watch unite nations government officials international mediators assure future respect commitments make international community senior platform official fahad ag almahamoud say state radio cma official bilal ag cherif echo message say party must respect document behavior everyday action rival tuareg group fight territory politics years recent clash complicate efforts counter al qaeda-linked militants take north 2012 french-led intervention push back peace deal follow temporary ceasefire agree last month allow regional governor return city kidal seem like permanent agreement follow ceasefire could hold say andrew lebovich european council foreign relations depend internal calculations group people simply use agreement rebuild force rival tuaregs sign deal end years mali fight