Three CRPF personnel, including an assistant sub-inspector, were on Sunday injured when a pressure bomb laid by Naxals exploded in Chhattisgarh’s Bijapur district, police said. The incident occurred when a joint contingent of 168th battalion of Central Reserve Police Force and district force was carrying out an anti-Naxal operation in Awapalli police station area, Bijapur SP KL Dhruv said.