Bharatiya Janata Party (BJP) Kerala chief PS Sreedharan Pillai on Saturday received a death threat letter from Mumbai.
"I'm a 66-year-old Malayalee from Mumbai. I will come to Kerala, join Bharatiya Janata Party's Rath Yatra and give news similar to Rajiv Gandhi's death," the letter read.
The party has filed a complaint with the police.
"The letter was sent via speed post. We have registered a complaint to the DGP of Kerala to take strong action against the person behind this," said advocate S Suresh of the BJP.