Hyderabad, Jan 26 (ANI): Film fraternity paid their tributes to versatile Malayalam actor Kalpana Rajani. Noted Malayalam actor Kalpana Ranjani, popularly known as Kalpana, died due to heart attack in Hyderabad. She was 51. Kalpana was in Hyderabad for the shooting of a Telugu film. She was admitted to the hospital after she was found unconscious in her hotel room. Doctors suspect that she died due to a heart attack but have not yet decided on conducting a post-mortem.