Mr Sanyal renounced violence in later years Photo: Sanjay Sah
One of the top leaders of a radical left-wing uprising in India called the Naxalbari rebellion has committed suicide, police say.
Kanu Sanyal, 81, was found hanging in his bedroom in Naxalbari village in the state of West Bengal.
Mr Sanyal was suffering from many ailments and had been depressed, the police say.
He led a peasant uprising in 1967 in Naxalbari, in which 11 farmers were killed in police firing .
The rebellion took its name from the village as Mr Sanyal and his close friend Charu Majumder broke away from the Communist Party of India (Marxist) to form a new party, the Communist Party of India (Marxist-Leninist).
The CPI (M-L) led the armed radical movement that shook West Bengal and the rest of the country in the 1970s.
Mr Sanyal was eventually arrested and was imprisoned in the southern state of Andhra Pradesh.
He was released from jail in 1977, following a change of government in India as well as in West Bengal.
Later, Mr Sanyal publicly renounced violence and formed the Organising Committee of Communist Revolutionaries (OCCR).
A year ago, Mr Sanyal told the BBC that he was opposed to the "politics of violence".
"Our violent movement had served no purpose, it will not serve any," he said.
That did not endear him to India's Maoists who say they bear the legacy of India's first left-wing radical uprising.