Air pollution choking New Delhi has ground outdoor work to a halt and disrupted air travel in the Indian capital.

A sharp spike in Delhi's air pollution was witnessed in the past 24 hours with 30 out of 36 monitoring stations reporting a severe air quality index.

Toxic smog in India and Pakistan has caused air quality in the major metropolitans of Lahore, Multan, Delhi and Chandigarh to deteriorate to toxic levels.

To combat worsening air quality, India's government has banned non-essential construction and encouraged residents to avoid burning coal for heating.

By Sakshi Dayal NEW DELHI (Reuters) -Toxic smog obscured India's famed monument to love, the Taj Mahal, as well as Sikhism's holiest shrine, the Golden Temple in Amritsar, and delayed flights on Thursday,