A letter threatening death was sent to 15 personalities, including former Karnataka CM HD Kumaraswamy and actor Prakash Raj, on Friday. The letter mentioned former Bajrang Dal leader Mahendra Kumar, actor Chetan Kumar, politicians BT Lalitha Naik and Brinda Karat, writer Agni Sridhar, among others. The letter called these personalities 'traitors' adding they will be assassinated on January 29.