Terming Naxals as the biggest terrorists, Chhattisgarh Chief Minister Raman Singh today said, there cannot be a soft line to deal with Maoists. He however disfavoured use of air power to combat the menace. Attributing the recent spurt in the Naxal violence to frontal operations by the security forces in the state, Mr Singh favoured a long-term action joint action plan with the Centre to tackle the problem. Raman Singh, who is in Delhi is likely to meet senior union ministers including the Home Minister to discuss the issue. He said the ultras have killed more than 1000 civilians and more than 650 policemen besides blowing up 132 electric towers, 106 school buildings and three hospitals in the state. <br/><br/> The CPI today also opposed the idea of using air force to fight Maoists. Party General Secretary A B Bardhan said in Bhubaneswar that his party did not comprehend the idea of limited mandate being given to the Home Minister in dealing with the problem.