Three soldiers of the International Security Assistance Force (ISAF) were killed in separate incidents of violence in various parts of Afghanistan . \"An International Security Assistance Force service member died following an improvised explosive device attack in northern Afghanistan. In a separate incident, an ISAF service member died following an insurgent attack in eastern Afghanistan today,\" an ISAF press release said on Friday. \"An International Security Assistance Force service member died following an improvised explosive device attack in southern Afghanistan today, \"it added.