Union Minister Dharmendra Pradhan on Saturday said the steel ministry is looking at an aggregate investment of USD 70 billion in the eastern region of the country through accelerated development of the sector. Launching the 'Purvodaya' programme here, Pradhan said the underdeveloped districts in West Bengal, Chhattisgarh, northern Andhra Pradesh, Jharkhand and Odisha have to be taken forward for development of the steel sector.