The Naxals torched two tipper trucks at the Jerum valley when the vehicles were going to Chhindgadh from Jagdalpur carrying the road construction equipment and material, Sukma SP Abhishek Shandilya told PTI over phone.
When the trucks reached Jerum valley, around 60 Maoists, including 50 armed ones, dressed as villagers, stopped the vehicles, asked the people to get down and set the trucks ablaze.
The trucks belonged to private contractors, Shandilya said adding police teams were sent to the spot.
The ultras are observing People's Liberation Guerrilla Army week from Sunday.
Shandilya claimed that a huge police force has been deployed to thwart the attempts of Naxals from conducting operations during the period.
