A case has been registered against former Bharatiya Janata Party member of Parliament Ram Vilas Vedanti, who allegedly issued a 'fatwa' against Dravida Munnetra Kazhagam patriarch and Tamil Nadu Chief Minister M Karunanidhi.

Acting on a complaint by one Dhananchezhian, a city resident, police filed the case on Monday night.

The case was registered against Vendanti for "promoting enmity between various communities, committing acts prejudicial to maintaining communal harmony and making statement conducive to public mischief," police said.

The complainant said the 'fatwa', allegedly issued by Vedanti saying that a person who beheaded Karunanidhi for his anti-Ram remarks would be rewarded with gold, could affect communal harmony and disturb peace in Tamil Nadu.

Meanwhile, police arrested 16 DMK activists for the attacks on the offices of BJP and Hindu Munnani, on Sunday, in Chennai.

All of them were remanded to 15 days judicial custody by a magistrate.