A 16-year-old girl who had gone missing on August 10 evening was found dead in a septic tank on Thursday evening.

Police have arrested three persons who are residents of villages in the girl’s neighbourhood. The police claimed the trio had admitted to abducting, raping and killing the Class X student and dumping her body in the septic tank.

Rehman Ali, Zamirul Haque and Tamirul Haque were produced in the chief judicial magistrate’s Court in Jalpaiguri on Friday and remanded in police custody for eight days.

A section of villagers demonstrated in front of Rajganj police station, alleging that the law enforcers hadn’t done enough to trace the teen.

Local Trinamul MLA Khageswar Roy demanded the transfer of all those police officers who were involved in the probe.

He reached the police station and spoke to the protesters. The MLA assured them that proper punishment would be meted out to the accused.

Pradeep Kumar Yadav, the superintendent of police of Jalpaiguri, said: “Senior officers will probe the charges against the Rajganj police personnel. If the allegations are correct, they will face action.”