Hyderabad: Bharat Rashtra Samithi (BRS) leader and former minister T. Harish Rao has demanded a CBI probe into Naini coal block tenders. Day after Deputy Chief Minister Mallu Bhatti Vikramarka directed Singareni Collieries Company Limited (SCCL) to cancel the tenders and called for the auction of Naini coal blocks in Odisha following allegations of corruption,.