'Police have begun investigations to ascertain the cause of death,' he said.
Local residents have demanded strict action against school authorities and threatened not to allow the school to re-open if police failed to act.
This was the second such case in the state this month. Earlier, a boy was found dead under mysterious circumstances in a residential school in Bhabua in Kaimur district.
Hundreds of residential private schools have come up across state with most running without proper monitoring and regulation by the government.