source: Twitter; Legit
actor1: Islamic State (West Africa) - Lake Chad Faction
actor2: Military Forces of Nigeria (2015-)
location: Ngamdu
notes: On 16 April 2020, presumed ISWAP fighters launched a mortar attack on a major camp of the Nigerian Armed Forces at Ngamdu (Kaga LGA, Borno) during a visit of the NAF chief of army staff. Several NAF soldiers were injured.