"Two constables of the force have been killed while their weapons, an AK-47 and an INSAS rifle, have been looted. The incident occurred at around 8am," a senior CISF officer said.
A joint squad of personnel from CRPF, CISF and state police has launched a combing operation in the area and reinforcements have been rushed.
The CISF headquarters in Delhi has despatched special director general RR Verma and deputy inspector general (operations) Jaideep Prasad by a special home ministry aircraft to the state for an inquiry.
The Bacheli-Kirandul complex has witnessed a number of naxal attacks and six CISF men were killed earlier this year in an ambush by the ultras in the Maoist hotbed of Dantewada in the Bastar region of the state.
CISF has since geared up its presence in the area.