Dharma Productions has announced a film on Indian lawyer C Sankaran Nair, who fought the British Raj to uncover the truth behind the Jallianwala Bagh massacre.

Directed by Karan Singh Tyagi, the film is based on the book The Case That Shook The Empire, written by C Sankaran Nair's great-grandson Raghu Palat and his wife Pushpa Palat. The project will go on floors soon.

"Extremely excited and honoured to be bringing the untold story of C. Sankaran Nair, a historic man to the big screens. Directed by @karanstyagi," producer Karan Johar tweeted.

The Jallianwala Bagh massacre took place on 13 April in 1919. Close to 400 people died when General Dyer and his soldiers opened fire on a crowd of non-violent protesters in Amritsar, Punjab. Following the incident, the Government of India formed the Hunter Commission to enquire into the killings. The event is seen as a turning point in India's freedom movement, deflecting public sentiment from the British regime.