The blast occurred on Cholnar-Kirandul road under Kirandul police station limits when the security personnel were patrolling along a road construction route in the region this afternoon, Inspector General of Police, Bastar Range, SRP Kalluri told PTI.
The mine-protected vehicle, with 11 state police jawans aboard, was dispatched from Cholnar camp to ensure security for the construction work underway in the region, located around 450 kms away from state capital Raipur, when the rebels triggered the blast leaving four personnel dead and seven others injured, Kalluri said.
Soon after the incident, reinforcement was rushed to the spot and the injured personnel were admitted to a local hospital, he said.
A combing operation has been launched in the region to nab the attackers, the IG added.
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This is the fourth major attack by Naxals in the insurgency-hit state in three days.
Earlier, seven STF personnel were killed and ten others injured on Saturday when Naxals ambushed them in the forests of Pidmel village in Sukma district.
The Naxals yesterday set ablaze at least 17 vehicles engaged in mining work in Kanker district. No one was hurt in the incident, police said.