An 18-year-old Class 12 student was found in a burnt condition behind the guard room of a school in east Delhi's Krishna Nagar on Saturday, police said.
Police received a PCR call about a fire at the school, following which personnel from Krishna Nagar police station rushed to the spot and found the girl, they said.
Certain materials were recovered from the spot and the student's school bag during preliminary proceedings, police said.
The crime team was called to inspect the scene and collect evidence.
The circumstances leading to the incident are being examined, and further investigation is underway, police added.