mogadishu two somalia highest-ranking military officials resign state outlets say thursday move could deal blow war-torn horn africa country efforts fight islamist militants somalia war since 1991 clan-based warlords overthrow dictator siad barre turn decade weak u.n.-backed government also fight alongside african union troop al shabaab aim topple government impose strict interpretation islam thursday state-owned radio muqdisho say army chief defence force ahmed jimale gedi step defence minister abdirashid abdullahi mohamed submit resignation president mohamed abdullahi farmaajo cabinet cabinet appoint general abdiweli jama hussein ... ahmed jimale gedi resign thursday radio station say add mohamed bid also accept radio muqdishu disclose reason behind decisions neither officials government spokespeople immediately available comment al qaeda-allied al shabaab drive capital mogadishu 2010 deadly attack remain one main obstacles stability chaotic nation lie along one world busy ship rout somalia rebuild efforts also hamper clan rivalries rival regions still sometimes take arm somalia 's top military chiefs resign reason give