The attack occurred at 0200 AM when a contingent of STF was out for an operational task on NH30 in Darbha region of the district, notorious for naxal violence.
The location of the ambush is close to Jeeram Ghati area of Bastar where the top Congress leadership of the state was wiped out by Maoists in May, 2013, killing 31 people.
Assistant Platoon Commandant (APC), STF Krishna Pal Singh was killed while a constable Santosh Yadav sustained minor injuries in the incident, Inspector General of Police (SIB) Deepanshu Kabra told PTI.
When the team reached near the village covering a distance of 3 kms, a large group of armed naxal opened indiscriminate firing at them, following which security personnel launched retaliatory attack, he said.
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After the ensuing gunfight that lasted for around two hours, naxals fled into the thick jungles, he said.
APC Singh, who had sustained grievous bullet injuries, succumbed while being rescued out from the spot, Kabra said, adding, Yadav has been admitted to a hospital in Jagdalpur.
It was not immediately known if the Naxals had suffered any casualties, he said.