Three labourers were killed in a landmine blast near Mundibedha village under the Raighar police limits in Nabarangpur district on Monday evening.
The labourers while returning home by a tractor after completing their work saw near the roadside of Venus village a suspicious piece of rag tied in a branch of a tree.
The trio got down of the vehicle to check the rag. And suddenly, the landmine exploded killing then on the spot.
The deceased were identified as Bharat Gond and Dasarath Jani of Marangpalli while the other was the tractor driver lokiram Gond of lalmati village.
Following the incident, police rushed to the spot and began investigation.
On Tuesday, family members of the deceased labourers blocked the Kundei-Raighar-Umarkote road keeping the dead bodies in the tractor on the road demanding adequate compensation for them and stringent action against the culprits.
Traffic movement was disrupted on the road for more than two hours.
The agitation was withdrawn after police reached the spot and assured the agitators of an early action in the matter.
locals and police suspected that the landmine was planted by Maoists to target security forces.