According to an Indian Express report, traces of methyl alcohol were found in Mani's body.
Doctors at Amrita Institute of Medical Sciences (where Mani was admitted) noticed presence of methyl alcohol in his blood. Subsequently, they alerted police, leading to registering a case. But, police could not record the statement of Mani due to his deteriorating health condition," the report further added.
Popular Malayalam actor Kalabhavan Mani passed away at a private hospital in Kochi on Sunday. He was 45.
Unwell for a while, Mani was hospitalised for the past two days.
In a career spanning close to a quarter century, Mani has acted in around 200 films and of late, was seen more often in Tamil films.
Beginning his career as a mimicry artiste, he went on to play serious and even villain roles and was a popular singer too, especially of ballads.
For his brilliant portrayal as a blind man in the film Vasantiyum Lakshmiyum Pinne Njanum, he won the special jury award at the national and the state level.
(With inputs from agencies)