A group of ultras were planting the landmine near Tekguda in Kalimela area, about 55 km from here in the early hours yesterday when the explosion took place, Inspector In-Charge of Malkangiri police station, Anirudh Routray said.
While one of the red rebels died on the spot, two others sustained serious injuries, he said
The incident came to light today and combing operation has been intensified in the area, he said.