India has focused on a rapid development of infrastructure along the northern borders with China for obvious "strategic reasons", External Affairs Minister S Jaishankar said on Wednesday amid the continuing 33-month border row in eastern Ladakh.

The minister told a group of reporters that the work on the strategically important Chushul-Dungti-Fukche-Demchok road, spanning 135 kilometres in the Ladakh region, began last month.