Indian State-run National Aluminium Company Limited (Nalco) has been hauled up by the national auditor Comptroller and Auditor General (CAG) for a delay in developing captive coal blocks allocated to it, which resulted in a potential loss of revenue. In its report submitted to Parliament on Wednesday, the CAG noted that the company had lost potential revenue of about $157-million from producing about 493 000 t of metal less than during the period 2012/13 to 2016/17, largely owing to its failure to develop Utkal E coal block, which was allocated to Nalco in 2014.