A case has been registered against the close aide of Karnataka Minister Priyank Kharge, Raju Kapanur, and five others in connection with hatching a conspiracy to kill BJP MLA Basavaraj Mattimadu and other leaders, police said on Sunday.

The case was registered based on a suicide note by a civil contractor, Sachin Panchal, who had mentioned that the Congress leaders had connived to kill Mattimadu, Siddalinga Swami of Andola Math, BJP leaders Manikanth Rathod and Chandu Patil. Panchal, a contractor from Bidar, allegedly ended his life by lying down in front of an approaching train on Thursday.