The troopers were returning after security deployment for polling in Sukma region when a landmine blast took place between their two vehicles near Kerlapal camp, Additional Director General Police (Naxal Operations), R K Vij told PTI.
While three persons were killed, two others were injured in the blast.
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Soon after getting news of the incident, additional forces were rushed to the spot and the injured were being retrieved from there, he said.
According to police sources, a convoy of BSF vehicles was returning to their camp after conducting poll duty in the region, when Naxals triggered a blast on a road near Manjhipara and Badeshetti villages in Sukma.