The police began an investigation into the death of Mahila Morcha leader Saranya Ramesh, 27, at Mattumantha, near here.
Saranya, the Palakkad constituency treasurer of the Mahila Morcha, was found dead at her house on Sunday evening.
The police recovered a note, presumed to have been written by Saranya, from her room. The police said they had launched an investigation based on the content of the note, which reportedly blamed a Bharatiya Janata Party (BJP) worker, Prajeev, for her death.