Assistant constable Somlu Hemla (30) posted at Mirtur police station limits was killed with a bow and arrow in Patliguda village of the region, a police official said.
Soon after information was received, security forces were rushed to the spot, the official said, adding further details are awaited.
In another incident, Maoists torched a road roller and a motorcycle in Kanker district of North Bastar region.
The incident took place at Sarhandi Sihari village under Tadoki police station limits, the official said.
After committing the crime, the Maoists fled deep into the forest.
A combing operation has been launched in the region to nab the insurgents, he said.