source: Nigeria Punch; AFP
actor1: Islamic State (West Africa) - Lake Chad Faction
actor2: Unidentified Armed Group (Nigeria)
location: Mamuri
notes: On 12 December 2019, Boko Haram (JAS) in connection with ISWAP fighters attacked a security post held by a civilian militia group in Mamuri (Abadam, Borno), and killed fifteen people, including one mobile police officer.