actor1: Police Forces of Nigeria (1999-2015)
actor2: OPC: Oodua Peoples Congress
notes: Police clashed with group of people believed to be members of the Oodua Peoples Congress (OPC) after they allegedly attacked the Otta Police Station. Five were killed.
target_text: actor1: Police Forces of Nigeria (1999-2015), actor2: OPC: Oodua Peoples Congress