Maoists set ablaze two tractors and a road-making machine and left behind a Maoist leaflet here. The armed Maoists on Friday raided the camp at Patrapara of a contractor who was constructing a road under the Pradhan Mantri Gram Sadak Yojana from Muniguda to Ambadala, Superintendent of Police Rajesh Pandit said on Saturday. Workers were not at the site when the incident took place, sources said. — PTI