source: Mimi Mefo; Undisclosed Source; Sembe TV; L'Oeil
actor1: Islamic State (West Africa) - Lake Chad Faction and/or Boko Haram - Jamaatu Ahli is-Sunnah lid-Dawati wal-Jihad
actor2: Civilians (Cameroon)
location: Ashigashiya
notes: On 17 December 2021, Boko Haram fighters attacked Ashigashiya village in Mayo Moskota subdivision (Mayo-Tsanaga, Extreme-Nord), killing 6 people.