source: Twitter
actor1: Boko Haram - Jamaatu Ahli is-Sunnah lid-Dawati wal-Jihad
actor2: Islamic State (West Africa) - Lake Chad Faction
location: Mamouri
notes: On May 28, the Shekau faction of ISWAP/Boko Haram reportedly clashed with members of the Mamman Nur (Barnawi) faction east of Mamouri (Bosso, Diffa), no casualties reported.