Naxalites killed a former sarpanch (village head) who was contesting the upcoming panchayat elections in Chhattisgarh's Dantewada district, police said on Friday. A group of unidentified men stormed the house of Joga Barse (52) in Aranpur village on Thursday night and hacked him to death with an axe in front of his family members, a police official here said.