New Delhi, Oct 22 (ANI): The Bharatiya Janata Party (BJP) on Tuesday demanded a thorough probe of the coal blocks allocation scam, and said that if no action is taken against Prime Minister Manmohan Singh, it will send out a message that the CBI is not able to work independently. The CBI is likely to file a status report on the coal blocks allocation before the Supreme Court today, regarding details of its 14th FIR against Hindalco and others and also progress in the remaining 13 cases.