The shocking case of a teenager burnt alive after accusing her headmaster of sexual assault has sparked protests in Bangladesh.

Nusrat Jahan Rafi, 18, was tricked into venturing on to a rooftop at her madrassa – or school – where at least four people doused her in kerosene and set her alight, according to Human Rights Watch (HRW).

Nusrat Jahan Rafi, 18, was burnt alive after accusing her headmaster of sexual assault.

Rafi was attacked because she had refused to back down and withdraw her allegations.

As she lay dying in hospital, with burns covering 80 per cent of her body, she recorded a defiant message on her brother's phone. "The teacher touched me. I will fight this crime until my last breath," she said.