A school headmaster, the main accused in the alleged burning alive of a schoolteacher, surrendered in court Saturday, police said.

After surrendering, Sanjay Singh claimed he was innocent.

School teacher Ranjit Kumar Razak, 40, was burnt alive May 30 in Bihar's Purnia district. Sanjay Singh had been booked on a complaint by Razak's wife.

A police officer said that a group of teachers, along with the principal of a middle school, took Ranjit to a toilet, tied his hands and legs and poured kerosene on him before setting him ablaze.