Six Central Reserve Police Force personnel, including an inspector, were killed in a landmine blast triggered by Naxals in Chhattisgarh's Narayanpur district on Friday. The incident occurred on a state highway when the CRPF team was proceeding on an anti-Naxalite operation from Konda to Narayanpur at around 11 am, CRPF spokesman Ajay Chaturvedi said.