source: Sun (Nigeria); The Cable (Nigeria); Daily Trust (Nigeria); Vanguard (Nigeria); Daily Leadership (Nigeria)
actor1: Islamic State (West Africa) - Lake Chad Faction
actor2: Military Forces of Nigeria (2015-)
location: Damboa
notes: On 28 October 2021, suspected ISWAP militants clashed with military forces in Damboa (Damboa, Borno). Four persons including three policemen were killed, other sources report a dozen civilians and two policemen killed while the police office and three operational vehicles were set ablaze.