actor1: Police Forces of Nigeria (1999-2015)
actor2: Unidentified Armed Group (Nigeria)
notes: Two police officers are killed on the Aba-Umuahia section of the Enugu-Port Harcourt highway in Abia by unidentified gunmen.
target_text: actor1: Police Forces of Nigeria (1999-2015), actor2: Unidentified Armed Group (Nigeria)