The incident took place near Dodipadar village when a DRG team was returning after an anti-naxal operation on Wednesday evening.
Around 30 policemen, including Choubey, were killed in ambushes and landmine attacks by Maoists in three separate incidents in Madanwada and nearby areas in Rajnandgaon on July 12, 2009.
NCP's Gadchiroli unit president Ravindra Wasekar said Ramchandani will be sacked from the party.
In retaliation, Naxals attacked the Karnataka State Reserve Police battalion in Venkammanahalli in Tumkur district five days later and killed seven KRSP personnel and a civilian.
A CRPF officer from Kalaburagi was among three of the personnel killed in an encounter with Naxals in Chhattisgarh’s Bijapur district on Friday.
The Minister of State for Home Affairs, G Kishan Reddy, informed the Lok Sabha that a total of 8,782 cases of Naxal violence were reported during 2009-13 as against 4,969 during 2014-18.
As many as 15 police personnel and the private vehicle's driver were killed when Naxals triggered an improvised explosive device (IED) blast.
Slain Chhattisgarh BJP MLA's wife felt 'hurt' after not being invited to PM Modi's swearing-in ceremony
Barely two days before the first phase of polling in Bastar Lok Sabha constituency, the BJP MLA Mandavi and four policemen were killed in a powerful IED blast triggered by the Maoists.
There were at least a dozen intelligence alerts indicating the possibility of precisely such attacks in the Maoist-infested district, but complacency may have overtaken caution, he said.
Despite its 'tall talk', Modi government learnt no lessons from Pulwama, Congress leader Ahmed Patel said.
Terming it a 'big loss' for the force, Jaiswal said that police 'were ready to give a befitting reply to the Naxals'.
A case was registered by police in this connection and the state election office was also probing the incident, they said.
The opposition BJP calling the Maoist attack, just couple of days ahead of the polling in Bastar Lok Sabha seat, as a political conspiracy and has demanded a CBI investigation into it.
BJP denied tickets to all its all 10 sitting MPs in the state this time after suffering a massive defeat in last assembly polls.
The Home Minister said that change could be brought in Naxal-affected areas through democratic ways, not through guns.