Hitting out at the State Government over PCS pre-examination paper leak, the Opposition parties have demanded a CBI investigation into the matter saying the police is incompetent to probe the case. “There is a big scam in recruitments. Earlier there were reports about recruitment in police and this leak in entrance exam paper of PCS preliminary shows that this Government is not competent enough to organise scam free examinations,” BJP spokesman Manoj Mishra said. He demanded that Chairman Uttar Pradesh Public Civil Services Examination Anil Yadav and Secretary, UPPCS should be suspended immediately.