Delhi smog: Schools and colleges shut as pollution worsens

Authorities in the Indian capital, Delhi, have shut all schools and colleges indefinitely amid the worsening levels of air pollution.

Construction work has also been banned until 21 November but an exception has been made for transport and defence-related projects.

Only five of the 11 coal-based power plants in the city have been allowed to operate.

A toxic haze has smothered Delhi since the festival of Diwali.