The 31 ultras killed in the February 9 encounter in Bijapur in Chhattisgarh included the mastermind of the January 6 IED blast in which eight security personnel and a civilian lost their lives and several other deadly attacks, a police official said. Among the 31 ultras killed in the encounter was Hunga Karma, who was secretary of the west Bastar division of the outlawed Communist Party of India (Maoist) and carried a reward of Rs 8 lakh on his head. He was the mastermind of the January 6 attack on security personnel. Karma also masterminded the 2006 Murkinar camp attack in which 11 police personnel were killed as well as the 2007 Ranibodli camp attack in which 55 security personnel were killed. Of the 31 killed ultras, 28, including 17 men and 11 women, have been identified and they carried a cumulative reward of Rs 1.10 crore on their heads. Out of the 81 Naxalites gunned down in the state so far this year, 65 were killed in the Bastar division, which comprises Bijapur and six other districts. So far this year, 77 firearms, including two AK-47 rifles, five Self Loading Rifles (SLR) and two INSAS rifles and three.303 rifles, have been recovered following separate encounters in Bastar region, the IG informed.