Wearing badges to show their opposition to the project and their pride in Tamil culture, scores of personalities, including Tamil superstar Rajnikanth, actors Vijay Kumar and Radha Ravi, and leading technicians participated in the fast.
The fast was called by the Tamil Film Chamber of Commerce.
Speakers at the fast condemned the attack on cinemas screening Tamil films in Bangalore and said the film industry was the first victim during such issues.
Image: Tamil actors Sathyaraj, Sarathkumar, Rajnikanth and thespienne Manorama participate in the day-long fast against Karnataka, in Chennai on Friday.
Reportage: PTI | Photograph: Sreeram Selvaraj