actor1: Unidentified Armed Group (Nigeria)
actor2: Civilians (Nigeria)
notes: A commercial tricycle drives over an IED outside of Biu. The blast killed four civilians and a solider. Preliminary investigations show that the IED was buried a long time ago undetected. It exploded when the tricycle erroneously ran over it.
target_text: actor1: Unidentified Armed Group (Nigeria), actor2: Civilians (Nigeria)