source: Vanguard (Nigeria); Nigeria Punch; Daily Post (Nigeria); Daily Trust (Nigeria)
actor1: Boko Haram - Jamaatu Ahli is-Sunnah lid-Dawati wal-Jihad
actor2: Civilians (Nigeria)
location: Lassa
notes: Around 9 December 2019, presumed Boko Haram (JAS) fighters attacked Lassa village in Askira-Uba LGA (Askira/Uba, Borno).