Two days before the first phase of Assembly polls in Assam, ethnic insurgent outfit Karbi Peoples Liberation Tiger (KPLT) today gunned down four CRPF jawans and injured another in an encounter in Karbi Anglong district. According to police, several CRPF men are missing after the encounter. On Friday, an operation was launched by the CRPF in the Deothar area, under Bokajan police station, against the newly-formed KPLT militants. The CRPF personnel came face to face with a large group of KPLT rebels at Arlangso today and an encounter ensued in which the CRPF men were gunned down. The police said, the operations are continuing and a search is on for the missing CRPF men.