Vastavam web: This is another big jolt to Maoists as 12 of their colleagues were killed in a big encounter occurred in Sukma district of Chattishgarh. More than 12 Maoists have been killed in a massive anti-Maoist operation launched jointly by the Chhattisgarh Police and CRPF (Central Reserved Police Force) in Sukma district today. Three jawans have also died in Operation Prahar, said DM Awasthi, a senior officer connected with the anti-Maoist operations in the state. The exchange of fire had gone on for 12 hours. Operation Prahar is one of the biggest operations aimed at flushing out the Maoists hiding in forests of Tondamarka, an area located in the Maoist stronghold of the state’s Sukma, where a Maoist attack had claimed the lives of 25 security men in April. The 56-hour long operation had started on Saturday. More than 1,500 security personnel took part in the operation.