The bomb exploded when the victim, Churan Lal, a native of Balod district, was going to work in a field in the restive Kurri village under Korar police station limits of the Maoist-hit district, a senior police official told PTI.
When Lal and other villagers were going to work this morning, they spotted a Naxal banner hanging on a tree near a pond on the village outskirts, the official said.
When he tried to go near the banner, Lal inadvertently stepped on the ground under which the pressure bomb was laid. The bomb then suddenly exploded, leaving him seriously injured, he said.
The bomb trap was apparently laid to harm security personnel but the villager fell prey to it, he said.
Security forces have launched a manhunt in the region to nab the culprits, police said.