A squad of about 80 armed Maoists surrounded a Central Reserve Police Force (CRPF) camp in Sukma's Burkapal village and fired heavily, official sources said.
In the ensuing firing, one CRPF jawan was injured, they said.
Some Naxals are also suspected to have been injured.
The injured trooper has been rushed for medical aid.
The force has stepped up security patrols in the area after the attack that took place around 2:15 PM.
"The post belongs to the 74th battalion of the force and firing has stopped now," a senior police official said.