On 25 May 2013, Naxalite insurgents of the Communist Party of India (Maoist) attacked a convoy of Indian National Congress leaders in the Darbha Valley in the Sukma district of Chhattisgarh, India. The attack caused at least 27 deaths, including that of former state minister Mahendra Karma and Chhattisgarh Congress chief Nand Kumar Patel. Vidya Charan Shukla, a senior Congress leader also later succumbed to his injuries on 11 June 2013.