NEW DELHI, Nov. 8 (Xinhua) -- Four people including a paramilitary trooper were killed and a few others wounded Thursday after Naxals triggered an improvised explosive device (IED) blast targeting a bus carrying them in central Indian state of Chattisgarh, officials said.

The incident occurred at Bacheli in Dantewada, about 383 km south of Raipur, the capital city of Chhattisgarh.

"Today Naxals triggered a bus that was carrying paramilitary Central Industrial Security Force (CISF) personnel with an IED blast. We are being told four people - three civilians and one CISF person - were killed in the blast," a local government official said.

The deceased civilians include driver and cleaner of the bus.

Reports said the bus was used by CISF personnel deployed for election duty in the area.

According to officials, the CISF men were reportedly on their way back to their camp after buying vegetables from the market.

The is the second Naxalite attack in the area in recent days.

Last week, two police personnel and a cameraman of the state-run Doordarshan were killed in an attack at Nilawaya village in the district.

Local elections are scheduled to be held in Chhattisgarh next week in two phases on November 12 and November 20.