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A group of ultras raided the site at MV-79 village, about 70 km from here, and torched the vehicle and the equipment after pouring fuel on them.
The rebels had earlier threatened the contractor engaged with the work not to go ahead with the project, the sources said adding stalling the work was apparently aimed at preventing security forces from moving into areas under naxal control.
The Maoist action came a day after the ultras dug up Mahupadar-Salim road connecting neighbouring Chhattisgarh at two-three places in Mathili area, about 50 km from here.
Movement of people as well as security forces was affected by the arson.