Indian firm Reliance ADA Group is planning to invest between $5bn and $10bn in the development of the coal mining infrastructure in Indonesia.

The firm has acquired a coal mine on Sumatra Island and is planning to build infrastructure, including a railway line, to transport its coal to the nearest port.

The firm will also invest in the new Jakarta rail line to the airport, reports Reuters.

In January, several Indian firms signed agreements totaling $15bn with Indonesia to build several infrastructure projects, including airports and a steel plant, to help the country overcome the lack of infrastructure development.