Armed ultras had abducted three persons from Kiang area recently and killed two of them while freeing another, Malkangiri Superintendent of Police Akhileswar Singh said.
The bodies of Gopi Pujari, a shop-keeper, and Hatiram Pujari were found on a forest road this morning with their throats slit and bearing gun-shot marks, he said, adding another person Padmanav Pujari was set free by the rebels.
While Gopi had been kidnapped from a village festival venue on April 19, the other two were abducted on April 22.
The killing was probably committed by Maoists from neighbouring Chhattisgarh who suspected the two to be passing on information about rebel activities to the police, sources said.
Following the incident, the borders with Andhra Pradesh and Chhattisgarh had been sealed.