Complimenting the police, the DGP said the District Voluntary Force and the state's elite anti-Maoist force, Special Operations Group, took part in the operation with BSF personnel in the background. Pointing out that Malkangiri and Koraput were the two worst Maoist-hit districts, Mishra said the operation was carried out entirely by the state police. With the elimination of the 13 Maoists, 17 of them have so far been killed this year compared to ten in 2012 in Odisha encircled by Maoist-hit states like Chhattisgarh, Jharkhand, Andhra Pradesh and West Bengal, police sources said. While the Odisha Police have been successful in containing Maoist violence in five districts, seven districts have been identified as highly affected and six others as moderately affected. "There has been no incident in five districts for above one and half years," a senior official said. He said Maoists have been trying to increase their sphere of influence also to Subarnapur and Kalahandi districts. "They have been trying to consolidate and strengthen themselves on Odisha-Chhattisgarh border (Nabarangpur, Nuapada, Bolangir, Baragarh and Kalahandi districts)," a senior official said.