Parts of northern India are experiencing a severe, prolonged cold wave that has thrown normal life out of gear.

Dense fog has delayed more than a hundred flights and dozens of trains, causing chaos at airports and railway stations.

Authorities in the capital Delhi have asked schools to extend winter holidays and cancelled classes.

The minimum temperature in parts of the city dropped to 1.9C on Sunday.

Other northern states have also been grappling with an acute cold wave, with temperatures plummeting to -6C (21F) in Indian-administered Kashmir.