The four, who turned themselves in, have been identified as Vishal alias Munshi Potavi, 30, Prabhakar Lalu Ramdas Gota, 30, Kishore Punami Chatru, 20, and Sudhakar Danu, 28, a release from Gadchiroli police said.
Last week, Chatgaon Dalam commander Vijay Dugga, who carried a reward of Rs 12 lakh on his head along with his wife Radha, who carried reward of Rs 2 lakh on her head, had surrendered, police added.