The incident happened around 7:30 pm near Kamaloor railway station, where track-laying work was underway on the Kirandul-Visakhapatnam route, a police official told PTI over phone.
Around two dozen armed Maoists reached the construction site and torched the vehicles and the track-laying machine, he said.
Bhansi is located around 450 kilometres from Raipur. Security personnel were rushed to the site after the railway staff there informed them about the incident, the official added.
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