Four people have been arrested for killing a 16-year-old girl in Achham. Srijana Bhandari, 16, of Khimda in Mangalsen Municipality-11 was found dead at a place called Kharatola on Friday. She had been missing since December 7. The relatives of the deceased had lodged a complaint against the four. Police have arrested four persons on the basis of the complaint. According to the District Police Office, Achham, an investigation is underway into the incident.