Indian investigators drop coal scam case against billionaire Birla
August 30, 2014 at 01:18 AM EDT
NEW DELHI (Reuters) - India's Central Bureau of Investigation (CBI) has closed a coal scam case against billionaire Kumar Mangalam Birla and a former top bureaucrat that emerged in 2012 after an auditor's report on revenue loss to the exchequer from allocations of coal blocks.