The CRPF personnel were carrying out an area-domination operation in the area, when their mine-protected vehicle (MPV) was reportedly blown up.
The blast also injured six CRPF personnel, of which four are said to be critical.
All the injured personnel have been evacuated by helicopter to Raipur for medical treatment.
More details are awaited.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)