India, Dec. 6 -- Mammootty's Malayalam thriller Kalamkaval has registered a robust start at the box office, collecting Rs. 5 crore on its opening day across all languages in India, according to Sacnilk.

The collection surpasses the day-one earnings of Mammootty's previous release, Bazooka.

The narrative centers on a tense police investigation in the small village of Kottayikonam, triggered by a communal riot.

What starts as a routine inquiry soon unravels into a series of mysterious disappearances, leading to a dark and suspenseful hunt for truth.

Kalamkaval merges a moral-psychological thriller with a crime investigation, steering clear of typical mass-action tropes - a style that distinguishes it in contemporary Malayalam cinema.

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