Noone was injured in the incident that occurred last night at Amlidhar Ghati under Mardumpolice station limits, a senior police official told PTI.
He said a road was being constructed between Kaknar and Barsoor villages, located around 450 kms away from the capital, under the Pradhan Mantry Gram Sadak Yojna (PMGSY).
"As per preliminary information, a group of armed ultras reached the construction site at Amlidhar Ghati and torchednine tractors parked there," he said, adding that Maoists also threatened workers to stay away from the construction works before fleeing.