actor1: NDFB-S: National Democratic Front of Boroland-Songbijit
actor2: Police Forces of India (2014-)
notes: 2 NDFB-S militants were killed in a rescue operation by security forces in Umrangsho on 15 December 2017.
target_text: actor1: NDFB-S: National Democratic Front of Boroland-Songbijit, actor2: Police Forces of India (2014-)