Officials said the incident took place around 12:30 pm along the 5-km under-construction Kistaram-Palodi road when the troops of the 212th battalion of the Central Reserve Police Force (CRPF) were out for an operation.
Home Minister Rajnath Singh said the incident was "deeply distressing" and asked CRPF Director General R R Bhatnagar to rush to Chhattisgarh.
"My heartfelt condolences to the families of those personnel who lost their lives in Sukma blast. I pray for the speedy recovery of the injured jawans," he said.
The armoured MPV had gone about 10-feet into the air and crashed on the ground before splitting into pieces. All the personnel were killed due to the impact of the blast even as many were thrown out of the vehicle, officials said.
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"The troops who came under attack were travelling in the MPV and going towards a newly-opened post in Palodi. Naxals were first spotted in the area around 8 am and the CoBRA teams effectively retaliated and broke the ambush.
He had returned from the state only this morning after conducting an official tour.
When asked why MPVs were being used despite their vulnerability in Naxal areas, the DG said they were used sparingly and that they had not been abandoned completely for use in operations.
Officials said nine men were killed while two other jawans are injured after the armoured vehicle was blown up using over 50 kgs of improvised explosive devices (IEDs) concealed under the track that joins Kistaram to Palodi, a senior official said.
The blast is suspected to have been triggered by Maoists by joining wires from a distance when the MPV crossed over the IED, officials said.
They said the Maoist cadre led by elusive Naxal commander Hidma and his PLGA (Peoples Liberation Guerrilla Army) battalion no 1 could be behind the deadly attack.
Sukma, considered one of the worst insurgency-hit regions of the state, has witnessed several dreaded attacks on security forces in the past, particularly in summer season during which rebels carry out an annual tactical counter offensive campaign (TCOC).
Soon after the incident, reinforcements were rushed to the spot, around 500 kms from state capital Raipur, officials said, adding further details were awaited.
Those killed have been identified as Assistant Sub Inspector R K S Tomar, Head Constable Laxman and constables Ajay K Yadav, Manoranjan Lanka, Jitendra Singh, Shobhit Sharma, Manoj Singh, Dharmendra Singh and Chandra H S. The injured are Madan Kumar and Rajesh Kumar.
Twelve personnel of the force were killed on March 11 last year in the Bheji area of the district and their arms looted, when Naxals ambushed their patrol party.