The explosive was planted allegedly by Naxals.
The incident took place at around 2 pm in the forests near Pandemurga village under Nelasnar police station limits where security forces were deployed to ensure safety to an under- construction road,Bijapur Additional Superintendent of Police Indira Kalyan Elesela told PTI.
A joint squad of CAF and district force was deputed to ensure security to construction of Nelasnar-Bhairmgarh road.
While cordoning off forests in Pandemurga region, around 450 kms away from here, a jawan inadvertently stepped over a pressure improvised explosive device (IED)triggering the blast in which he sustained severe injures in his leg and thigh, the ASP said.
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The deceased was identified as Constable Samund Dewangan of CAF's 13th battalion.
He was native of Bastar district, the ASP said.
Three Central Reserve Police Force (CRPF) jawans were yesterday injured in a pressure bomb blast, allegedly planted by ultras, in the neighbouring Sukma district.