New Delhi, Nov 8 (DC): A CISF jawan and three civilians were killed in an improvised explosive device (IED) blast triggered by Maoists in poll-bound Chhattisgarh's Dantewada district on Thursday.

The blast took place on a bus near Bacheli in Dantewada and multiple casualties were reported.

Two personnel of the Central Industrial Security Force (CISF) were also injured in the incident, Dantewada Superintendent of Police Abhishek Pallava told PTI.

The explosion took place in a hilly area in Bacheli in Dantewada when the personnel were returning to their camp after purchasing groceries from market, he said. The injured personnel have been shifted to a hospital.

The civilians killed in the blast included the bus' driver, conductor and cleaner, Pallava said. The personnel belonged to a CISF unit that has been deployed in the area for the first phase of the forthcoming polls in the state.

Just a week ago, Maoists had ambushed Doordarshan (DD) crew and a police team in the forested village of Nilwaya in Chhattisgarh’s south Bastar district of Dantewada killing a DD cameraman and two cops.

DD cameraman Achyutanand Sahu was the third scribe killed by Maoists in Bastar in last five years.

The three-member DD team was in Nilwaya under Aranpur police limits for election coverage, when armed Maoists opened indiscriminate fire on them.

Assembly elections are scheduled to be held in Chhattisgarh next week in two phases on November 12 and November 20. The first phase is to be held in the Naxal-affected constituencies of Bastar region that falls in the southern part of the state.