Chandra Haasan (82) who was staying with his daughter Anu Haasan, also an actress, and son Nirmal Haasan in London collapsed following massive cardiac arrest last night, they said.
Chandra Haasan's wife Geethamani predeceased him in January this year.
Besides Chandra Haasan, Kamal Haasan has another brother Chaaru Haasan, also an actor.
The three were managing The Raj Kamal Films International, the production venture of Kamal Haasan.
Some of the flicks like Virumaandi, Sathileelavathi, Viswaroopam were produced by the firm.
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South Indian Film Artists Association, representing the film fraternity, condoled the death of Chandra Haasan.
The Association said Chandra Haasan was a guiding force to Kamal Haasan right from his early days in the tinsel world.
"The Association extends its deep condolences to family of Kamal Haasan and Chaaru Haasan on the demise of Chandra Haasan", it said in a release.
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Meanwhile, Kamal Haasan condoled the death ofChandra Haasan, stating he had not even achieved half of the dreams dreamt by his brother for him.
Kamal Haasan's daughter and actress Shruti Haasan in her condolence message, said her uncle (Chandra Haasan) was an honourable man with equipoise, strength of character and many achievements.
"May my uncle rest in peace - an honourable man with equipoise, strength of character and many achievements.
Thank you for the condolences", she Tweeted.