source: Guardian (Nigeria); Nigeria Punch
actor1: Unidentified Armed Group (Nigeria)
actor2: Police Forces of Nigeria (2015-)
location: Umundugba
notes: On 31 May 2021, police clashed with scores of armed individuals during an attack against the Umundugba Divisional Police Headquarters (Isu LGA, Imo). Petrol bombs were also thrown against the station. A number of causalities were reported on the side of the attackers.