Search and combing operations have been launched to trace the missing personnel. RAIPUR: In one of the deadliest Maoist attacks this year, at least 20 security personnel were martyred, 31 others injured in Saturday’s ambush in Chhattisgarh's Bijapur district. “We have recovered 20 blood-soaked bodies lying scattered at the encounter spot, the number of deaths might reach 22 or 23," a senior officer told TOI. A group of local reporters, who also visited the spot on Sunday morning, confirmed the death of at least 20 personnel. Several jawans are reported to be missing. A massive search and combing operations have been launched to trace the missing personnel.