The attacks once again revealed their brutal and inhuman face, he said.
Despite the Naxals' appeal to boycott, people of Bastar voted in large numbers on April 10 Lok Sabha election and showed their faith in the democracy, Singh said.
Naxals were frustrated by this and feared that they were losing their foothold in the region, he claimed.
Such incidents will not lower the morale of the government, people, polling personnel and security forces and they will fight confidently to drive out Naxalism from Bastar, he said, while condoling the families of the dead officials and CRPF personnel.
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Meanwhile, the main opposition Congress alleged lapses in the security.
State Congress chief Bhupesh Baghel said state government had been lax in ensuring security to the polling officials who were returning after the April 10 election.
Seven members of a polling party and five CRPF personnel were among the 14 killed as Naxals struck twice this morning in the span of less than an hour, blowing up a bus and later an ambulance in Bijapur and Bastar districts of Maoist-hit south Chhattisgarh.