Police say 17 people found in Sinai camp were “impersonating” registered cadres; Kuki-Zo insurgent group says they were long-term residents, calls for Central intervention; SoO camps no longer “untouchable”, says senior official. CRPF raids Sinai Kuki-Zo camp in Manipur under new SoO terms; 17 impersonators found, centre urged to intervene, camps to relocate.