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.
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.