A policeman was Saturday injured after Naxals triggered an improvised explosive device near a market in Chhattisgarh's insurgency-hit Dantewada district. A local police official told PTI that assistant constable Jagat Ram Karma was near a weekly market in Chhote Tumnar village under Geedam police station when the incident occurred. Karma, posted at Bijapur's Nelasnar police station, was rushed to a hospital in Bijapur and he is currently out of danger, the official informed. Combing operations have been launched in the region to track down the ultras, he added.