"conflict with bandits" . "*Ansaru" . . "Nigerian bandits" . "Ongoing" . "450,000 people displaced" . . "*Hausa militias" . . . "**Nigerian Air Force" . "Unknown" . . "Unknown" . . "1 Alpha Jet" . "Bandits" . . . "bandits" . "*Boko Haram" . . . . "*Nigeria Police Force" . "30,000+ Zamfara State" . . . "Nigeria" . "Alleged involvement" . "Nigerian bandit conflict" . "bandit conflict" . . "*Yan Sakai" . . . . "Vigilante groups" . . . . "Various gangs" . "At least 12,000 killed" . . . . "Nigerian bandit conflict" . . "bandit" . . "broader conflict" . "**Nigerian Army" . "*Vigilante Group of Nigeria" . "*Nigerian Armed Forces" . . . . "*Fulani militias" . "*Islamic State's West Africa Province" . .