Raipur, Mar 12 (ANI): Two Border Security Forces (BSF) personnel on Saturday were killed and four were injured during an encounter with Maoists in Kanker district of Raipur in Chhattisgarh. The four injured personnel have been taken to a hospital in Raipur where the doctors said that the injured soldiers are critical and are in need of immediate surgery. The incident came to light after a special operation was launched by the jawans from 171 Battalion of the BSF with the civil police near Becha village in Narayanpur district.